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<span>Toggle Eggs of different animal groups subsection</span> </button> <ul id="toc-Eggs_of_different_animal_groups-sublist" class="vector-toc-list"> <li id="toc-Fish_and_amphibian_eggs" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Fish_and_amphibian_eggs"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.1</span> <span>Fish and amphibian eggs</span> </div> </a> <ul id="toc-Fish_and_amphibian_eggs-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bird_eggs" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Bird_eggs"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2</span> <span>Bird eggs</span> </div> </a> <ul id="toc-Bird_eggs-sublist" class="vector-toc-list"> <li id="toc-Colours" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Colours"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2.1</span> <span>Colours</span> </div> </a> <ul id="toc-Colours-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Shell" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Shell"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2.2</span> <span>Shell</span> </div> </a> <ul id="toc-Shell-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Shape" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Shape"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2.3</span> <span>Shape</span> </div> </a> <ul id="toc-Shape-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Predation" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Predation"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.2.4</span> <span>Predation</span> </div> </a> <ul id="toc-Predation-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Amniote_eggs_and_embryos" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Amniote_eggs_and_embryos"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.3</span> <span>Amniote eggs and embryos</span> </div> </a> <ul id="toc-Amniote_eggs_and_embryos-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mammalian_eggs" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Mammalian_eggs"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.4</span> <span>Mammalian eggs</span> </div> </a> <ul id="toc-Mammalian_eggs-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Invertebrate_eggs" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Invertebrate_eggs"> <div class="vector-toc-text"> <span class="vector-toc-numb">1.5</span> <span>Invertebrate eggs</span> </div> </a> <ul id="toc-Invertebrate_eggs-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Evolution_and_structure" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Evolution_and_structure"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Evolution and structure</span> </div> </a> <ul id="toc-Evolution_and_structure-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Formation" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Formation"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Formation</span> </div> </a> <ul id="toc-Formation-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Scientific_classifications" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Scientific_classifications"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Scientific classifications</span> </div> </a> <button aria-controls="toc-Scientific_classifications-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Scientific classifications subsection</span> </button> <ul id="toc-Scientific_classifications-sublist" class="vector-toc-list"> <li id="toc-Egg_size_and_yolk" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Egg_size_and_yolk"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Egg size and yolk</span> </div> </a> <ul id="toc-Egg_size_and_yolk-sublist" class="vector-toc-list"> <li id="toc-Microlecithal" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Microlecithal"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1.1</span> <span>Microlecithal</span> </div> </a> <ul id="toc-Microlecithal-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Mesolecithal" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Mesolecithal"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1.2</span> <span>Mesolecithal</span> </div> </a> <ul id="toc-Mesolecithal-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Macrolecithal" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Macrolecithal"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1.3</span> <span>Macrolecithal</span> </div> </a> <ul id="toc-Macrolecithal-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Egg-laying_reproduction" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Egg-laying_reproduction"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.2</span> <span>Egg-laying reproduction</span> </div> </a> <ul id="toc-Egg-laying_reproduction-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Human_use" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Human_use"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Human use</span> </div> </a> <button aria-controls="toc-Human_use-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Toggle Human use subsection</span> </button> <ul id="toc-Human_use-sublist" class="vector-toc-list"> <li id="toc-Food" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Food"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1</span> <span>Food</span> </div> </a> <ul id="toc-Food-sublist" class="vector-toc-list"> <li id="toc-Eggs_and_Kashrut" class="vector-toc-list-item vector-toc-level-3"> <a class="vector-toc-link" href="#Eggs_and_Kashrut"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.1.1</span> <span>Eggs and Kashrut</span> </div> </a> <ul id="toc-Eggs_and_Kashrut-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Vaccine_manufacture" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Vaccine_manufacture"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.2</span> <span>Vaccine manufacture</span> </div> </a> <ul id="toc-Vaccine_manufacture-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Culture" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Culture"> <div class="vector-toc-text"> <span class="vector-toc-numb">5.3</span> <span>Culture</span> </div> </a> <ul id="toc-Culture-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Collecting" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Collecting"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Collecting</span> </div> </a> <ul id="toc-Collecting-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-See_also" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#See_also"> <div class="vector-toc-text"> <span class="vector-toc-numb">7</span> <span>See also</span> </div> </a> <ul id="toc-See_also-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-References" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#References"> <div class="vector-toc-text"> <span class="vector-toc-numb">8</span> <span>References</span> </div> </a> <ul id="toc-References-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-External_links" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#External_links"> <div class="vector-toc-text"> <span class="vector-toc-numb">9</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Table of Contents" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toggle the table of contents</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Egg</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 143 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-143" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">143 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-af mw-list-item"><a href="https://af.wikipedia.org/wiki/Eier_(biologie)" title="Eier (biologie) – Afrikaans" lang="af" hreflang="af" data-title="Eier (biologie)" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target"><span>Afrikaans</span></a></li><li class="interlanguage-link interwiki-als mw-list-item"><a href="https://als.wikipedia.org/wiki/Ei" title="Ei – Alemannic" lang="gsw" hreflang="gsw" data-title="Ei" data-language-autonym="Alemannisch" data-language-local-name="Alemannic" class="interlanguage-link-target"><span>Alemannisch</span></a></li><li class="interlanguage-link interwiki-ang mw-list-item"><a href="https://ang.wikipedia.org/wiki/%C3%86g" title="Æg – Old English" lang="ang" hreflang="ang" data-title="Æg" data-language-autonym="Ænglisc" data-language-local-name="Old English" class="interlanguage-link-target"><span>Ænglisc</span></a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A8%D9%8A%D8%B6%D8%A9_(%D8%A3%D8%AD%D9%8A%D8%A7%D8%A1)" title="بيضة (أحياء) – Arabic" lang="ar" hreflang="ar" data-title="بيضة (أحياء)" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Uevo" title="Uevo – Aragonese" lang="an" hreflang="an" data-title="Uevo" data-language-autonym="Aragonés" data-language-local-name="Aragonese" class="interlanguage-link-target"><span>Aragonés</span></a></li><li class="interlanguage-link interwiki-roa-rup mw-list-item"><a href="https://roa-rup.wikipedia.org/wiki/Ou" title="Ou – Aromanian" lang="rup" hreflang="rup" data-title="Ou" data-language-autonym="Armãneashti" data-language-local-name="Aromanian" class="interlanguage-link-target"><span>Armãneashti</span></a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/G%C3%BCevu_(biolox%C3%ADa)" title="Güevu (bioloxía) – Asturian" lang="ast" hreflang="ast" data-title="Güevu (bioloxía)" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-atj mw-list-item"><a href="https://atj.wikipedia.org/wiki/Wow" title="Wow – Atikamekw" lang="atj" hreflang="atj" data-title="Wow" data-language-autonym="Atikamekw" data-language-local-name="Atikamekw" class="interlanguage-link-target"><span>Atikamekw</span></a></li><li class="interlanguage-link interwiki-ay mw-list-item"><a href="https://ay.wikipedia.org/wiki/K%27awna" title="K'awna – Aymara" lang="ay" hreflang="ay" data-title="K'awna" data-language-autonym="Aymar aru" data-language-local-name="Aymara" class="interlanguage-link-target"><span>Aymar aru</span></a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Yumurta_(anatomiya)" title="Yumurta (anatomiya) – Azerbaijani" lang="az" hreflang="az" data-title="Yumurta (anatomiya)" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target"><span>Azərbaycanca</span></a></li><li class="interlanguage-link interwiki-ban mw-list-item"><a href="https://ban.wikipedia.org/wiki/Taluh" title="Taluh – Balinese" lang="ban" hreflang="ban" data-title="Taluh" data-language-autonym="Basa Bali" data-language-local-name="Balinese" class="interlanguage-link-target"><span>Basa Bali</span></a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%A1%E0%A6%BF%E0%A6%AE" title="ডিম – Bangla" lang="bn" hreflang="bn" data-title="ডিম" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target"><span>বাংলা</span></a></li><li class="interlanguage-link interwiki-bjn mw-list-item"><a href="https://bjn.wikipedia.org/wiki/Hintalu" title="Hintalu – Banjar" lang="bjn" hreflang="bjn" data-title="Hintalu" data-language-autonym="Banjar" data-language-local-name="Banjar" class="interlanguage-link-target"><span>Banjar</span></a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Nn%CC%84g" title="Nn̄g – Minnan" lang="nan" hreflang="nan" data-title="Nn̄g" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target"><span>閩南語 / Bân-lâm-gú</span></a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%AF%D0%B9%D1%86%D0%BE" title="Яйцо – Belarusian" lang="be" hreflang="be" data-title="Яйцо" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target"><span>Беларуская</span></a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%AF%D0%B9%D0%BA%D0%B0" title="Яйка – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Яйка" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target"><span>Беларуская (тарашкевіца)</span></a></li><li class="interlanguage-link interwiki-bcl mw-list-item"><a href="https://bcl.wikipedia.org/wiki/Sugok" title="Sugok – Central Bikol" lang="bcl" hreflang="bcl" data-title="Sugok" data-language-autonym="Bikol Central" data-language-local-name="Central Bikol" class="interlanguage-link-target"><span>Bikol Central</span></a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%AF%D0%B9%D1%86%D0%B5_(%D0%B7%D0%BE%D0%BE%D0%BB%D0%BE%D0%B3%D0%B8%D1%8F)" title="Яйце (зоология) – Bulgarian" lang="bg" hreflang="bg" data-title="Яйце (зоология)" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target"><span>Български</span></a></li><li class="interlanguage-link interwiki-bar mw-list-item"><a href="https://bar.wikipedia.org/wiki/Oa" title="Oa – Bavarian" lang="bar" hreflang="bar" data-title="Oa" data-language-autonym="Boarisch" data-language-local-name="Bavarian" class="interlanguage-link-target"><span>Boarisch</span></a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Jaje" title="Jaje – Bosnian" lang="bs" hreflang="bs" data-title="Jaje" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target"><span>Bosanski</span></a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Vi" title="Vi – Breton" lang="br" hreflang="br" data-title="Vi" data-language-autonym="Brezhoneg" data-language-local-name="Breton" class="interlanguage-link-target"><span>Brezhoneg</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Ou_(biologia)" title="Ou (biologia) – Catalan" lang="ca" hreflang="ca" data-title="Ou (biologia)" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%C3%87%C4%83%D0%BC%D0%B0%D1%80%D1%82%D0%B0" title="Çăмарта – Chuvash" lang="cv" hreflang="cv" data-title="Çăмарта" data-language-autonym="Чӑвашла" data-language-local-name="Chuvash" class="interlanguage-link-target"><span>Чӑвашла</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Vejce" title="Vejce – Czech" lang="cs" hreflang="cs" data-title="Vejce" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-sn mw-list-item"><a href="https://sn.wikipedia.org/wiki/Zai" title="Zai – Shona" lang="sn" hreflang="sn" data-title="Zai" data-language-autonym="ChiShona" data-language-local-name="Shona" class="interlanguage-link-target"><span>ChiShona</span></a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Wy" title="Wy – Welsh" lang="cy" hreflang="cy" data-title="Wy" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target"><span>Cymraeg</span></a></li><li class="interlanguage-link interwiki-dag mw-list-item"><a href="https://dag.wikipedia.org/wiki/Galli" title="Galli – Dagbani" lang="dag" hreflang="dag" data-title="Galli" data-language-autonym="Dagbanli" data-language-local-name="Dagbani" class="interlanguage-link-target"><span>Dagbanli</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/%C3%86g" title="Æg – Danish" lang="da" hreflang="da" data-title="Æg" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Ei" title="Ei – German" lang="de" hreflang="de" data-title="Ei" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Muna" title="Muna – Estonian" lang="et" hreflang="et" data-title="Muna" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%91%CE%B2%CE%B3%CF%8C" title="Αβγό – Greek" lang="el" hreflang="el" data-title="Αβγό" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target"><span>Ελληνικά</span></a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/%C3%93v" title="Óv – Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="Óv" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target"><span>Emiliàn e rumagnòl</span></a></li><li class="interlanguage-link interwiki-myv mw-list-item"><a href="https://myv.wikipedia.org/wiki/%D0%90%D0%BB" title="Ал – Erzya" lang="myv" hreflang="myv" data-title="Ал" data-language-autonym="Эрзянь" data-language-local-name="Erzya" class="interlanguage-link-target"><span>Эрзянь</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Huevo_(biolog%C3%ADa)" title="Huevo (biología) – Spanish" lang="es" hreflang="es" data-title="Huevo (biología)" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Ovo" title="Ovo – Esperanto" lang="eo" hreflang="eo" data-title="Ovo" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target"><span>Esperanto</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Arrautza" title="Arrautza – Basque" lang="eu" hreflang="eu" data-title="Arrautza" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AA%D8%AE%D9%85_(%D8%B2%DB%8C%D8%B3%D8%AA%E2%80%8C%D8%B4%D9%86%D8%A7%D8%B3%DB%8C)" title="تخم (زیست‌شناسی) – Persian" lang="fa" hreflang="fa" data-title="تخم (زیست‌شناسی)" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/%C5%92uf_(biologie)" title="Œuf (biologie) – French" lang="fr" hreflang="fr" data-title="Œuf (biologie)" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-fy mw-list-item"><a href="https://fy.wikipedia.org/wiki/Aai" title="Aai – Western Frisian" lang="fy" hreflang="fy" data-title="Aai" data-language-autonym="Frysk" data-language-local-name="Western Frisian" class="interlanguage-link-target"><span>Frysk</span></a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Ubh" title="Ubh – Irish" lang="ga" hreflang="ga" data-title="Ubh" data-language-autonym="Gaeilge" data-language-local-name="Irish" class="interlanguage-link-target"><span>Gaeilge</span></a></li><li class="interlanguage-link interwiki-gd mw-list-item"><a href="https://gd.wikipedia.org/wiki/Ugh" title="Ugh – Scottish Gaelic" lang="gd" hreflang="gd" data-title="Ugh" data-language-autonym="Gàidhlig" data-language-local-name="Scottish Gaelic" class="interlanguage-link-target"><span>Gàidhlig</span></a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Ovo_(biolox%C3%ADa)" title="Ovo (bioloxía) – Galician" lang="gl" hreflang="gl" data-title="Ovo (bioloxía)" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target"><span>Galego</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EC%95%8C" title="알 – Korean" lang="ko" hreflang="ko" data-title="알" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%81%D5%B8%D6%82" title="Ձու – Armenian" lang="hy" hreflang="hy" data-title="Ձու" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target"><span>Հայերեն</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%85%E0%A4%A3%E0%A5%8D%E0%A4%A1%E0%A4%BE" title="अण्डा – Hindi" lang="hi" hreflang="hi" data-title="अण्डा" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Jaje" title="Jaje – Croatian" lang="hr" hreflang="hr" data-title="Jaje" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Amniotala_ovo" title="Amniotala ovo – Ido" lang="io" hreflang="io" data-title="Amniotala ovo" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target"><span>Ido</span></a></li><li class="interlanguage-link interwiki-ig mw-list-item"><a href="https://ig.wikipedia.org/wiki/%C3%81kw%C3%A0" title="Ákwà – Igbo" lang="ig" hreflang="ig" data-title="Ákwà" data-language-autonym="Igbo" data-language-local-name="Igbo" class="interlanguage-link-target"><span>Igbo</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Telur" title="Telur – Indonesian" lang="id" hreflang="id" data-title="Telur" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-ik mw-list-item"><a href="https://ik.wikipedia.org/wiki/Mannik" title="Mannik – Inupiaq" lang="ik" hreflang="ik" data-title="Mannik" data-language-autonym="Iñupiatun" data-language-local-name="Inupiaq" class="interlanguage-link-target"><span>Iñupiatun</span></a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Egg" title="Egg – Icelandic" lang="is" hreflang="is" data-title="Egg" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target"><span>Íslenska</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Uovo_(biologia)" title="Uovo (biologia) – Italian" lang="it" hreflang="it" data-title="Uovo (biologia)" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%91%D7%99%D7%A6%D7%94" title="ביצה – Hebrew" lang="he" hreflang="he" data-title="ביצה" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-jv mw-list-item"><a href="https://jv.wikipedia.org/wiki/Endhog" title="Endhog – Javanese" lang="jv" hreflang="jv" data-title="Endhog" data-language-autonym="Jawa" data-language-local-name="Javanese" class="interlanguage-link-target"><span>Jawa</span></a></li><li class="interlanguage-link interwiki-kn mw-list-item"><a href="https://kn.wikipedia.org/wiki/%E0%B2%85%E0%B2%82%E0%B2%A1" title="ಅಂಡ – Kannada" lang="kn" hreflang="kn" data-title="ಅಂಡ" data-language-autonym="ಕನ್ನಡ" data-language-local-name="Kannada" class="interlanguage-link-target"><span>ಕನ್ನಡ</span></a></li><li class="interlanguage-link interwiki-ks mw-list-item"><a href="https://ks.wikipedia.org/wiki/%D9%B9%DA%BE%D9%88%D9%97%D9%84" title="ٹھوٗل – Kashmiri" lang="ks" hreflang="ks" data-title="ٹھوٗل" data-language-autonym="कॉशुर / کٲشُر" data-language-local-name="Kashmiri" class="interlanguage-link-target"><span>कॉशुर / کٲشُر</span></a></li><li class="interlanguage-link interwiki-kk mw-list-item"><a href="https://kk.wikipedia.org/wiki/%D0%96%D2%B1%D0%BC%D1%8B%D1%80%D1%82%D2%9B%D0%B0" title="Жұмыртқа – Kazakh" lang="kk" hreflang="kk" data-title="Жұмыртқа" data-language-autonym="Қазақша" data-language-local-name="Kazakh" class="interlanguage-link-target"><span>Қазақша</span></a></li><li class="interlanguage-link interwiki-sw mw-list-item"><a href="https://sw.wikipedia.org/wiki/Yai" title="Yai – Swahili" lang="sw" hreflang="sw" data-title="Yai" data-language-autonym="Kiswahili" data-language-local-name="Swahili" class="interlanguage-link-target"><span>Kiswahili</span></a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Ze" title="Ze – Haitian Creole" lang="ht" hreflang="ht" data-title="Ze" data-language-autonym="Kreyòl ayisyen" data-language-local-name="Haitian Creole" class="interlanguage-link-target"><span>Kreyòl ayisyen</span></a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/H%C3%AAk_(toxim)" title="Hêk (toxim) – Kurdish" lang="ku" hreflang="ku" data-title="Hêk (toxim)" data-language-autonym="Kurdî" data-language-local-name="Kurdish" class="interlanguage-link-target"><span>Kurdî</span></a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%96%D1%83%D0%BC%D1%83%D1%80%D1%82%D0%BA%D0%B0" title="Жумуртка – Kyrgyz" lang="ky" hreflang="ky" data-title="Жумуртка" data-language-autonym="Кыргызча" data-language-local-name="Kyrgyz" class="interlanguage-link-target"><span>Кыргызча</span></a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Ovum" title="Ovum – Latin" lang="la" hreflang="la" data-title="Ovum" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target"><span>Latina</span></a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Ola" title="Ola – Latvian" lang="lv" hreflang="lv" data-title="Ola" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target"><span>Latviešu</span></a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Ee" title="Ee – Luxembourgish" lang="lb" hreflang="lb" data-title="Ee" data-language-autonym="Lëtzebuergesch" data-language-local-name="Luxembourgish" class="interlanguage-link-target"><span>Lëtzebuergesch</span></a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Kiau%C5%A1inis" title="Kiaušinis – Lithuanian" lang="lt" hreflang="lt" data-title="Kiaušinis" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target"><span>Lietuvių</span></a></li><li class="interlanguage-link interwiki-lij mw-list-item"><a href="https://lij.wikipedia.org/wiki/%C3%96vo" title="Övo – Ligurian" lang="lij" hreflang="lij" data-title="Övo" data-language-autonym="Ligure" data-language-local-name="Ligurian" class="interlanguage-link-target"><span>Ligure</span></a></li><li class="interlanguage-link interwiki-ln mw-list-item"><a href="https://ln.wikipedia.org/wiki/L%C3%ADki" title="Líki – Lingala" lang="ln" hreflang="ln" data-title="Líki" data-language-autonym="Lingála" data-language-local-name="Lingala" class="interlanguage-link-target"><span>Lingála</span></a></li><li class="interlanguage-link interwiki-lfn mw-list-item"><a href="https://lfn.wikipedia.org/wiki/Ovo" title="Ovo – Lingua Franca Nova" lang="lfn" hreflang="lfn" data-title="Ovo" data-language-autonym="Lingua Franca Nova" data-language-local-name="Lingua Franca Nova" class="interlanguage-link-target"><span>Lingua Franca Nova</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Toj%C3%A1s_(biol%C3%B3gia)" title="Tojás (biológia) – Hungarian" lang="hu" hreflang="hu" data-title="Tojás (biológia)" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%88%D0%B0%D1%98%D1%86%D0%B5" title="Јајце – Macedonian" lang="mk" hreflang="mk" data-title="Јајце" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target"><span>Македонски</span></a></li><li class="interlanguage-link interwiki-mg mw-list-item"><a href="https://mg.wikipedia.org/wiki/Atody" title="Atody – Malagasy" lang="mg" hreflang="mg" data-title="Atody" data-language-autonym="Malagasy" data-language-local-name="Malagasy" class="interlanguage-link-target"><span>Malagasy</span></a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%AE%E0%B5%81%E0%B4%9F%E0%B5%8D%E0%B4%9F" title="മുട്ട – Malayalam" lang="ml" hreflang="ml" data-title="മുട്ട" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target"><span>മലയാളം</span></a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%A8%D9%8A%D8%B6%D9%87" title="بيضه – Egyptian Arabic" lang="arz" hreflang="arz" data-title="بيضه" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target"><span>مصرى</span></a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Telur" title="Telur – Malay" lang="ms" hreflang="ms" data-title="Telur" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target"><span>Bahasa Melayu</span></a></li><li class="interlanguage-link interwiki-mni mw-list-item"><a href="https://mni.wikipedia.org/wiki/%EA%AF%8C%EA%AF%A6%EA%AF%94%EA%AF%A8%EA%AF%9D" title="ꯌꯦꯔꯨꯝ – Manipuri" lang="mni" hreflang="mni" data-title="ꯌꯦꯔꯨꯝ" data-language-autonym="ꯃꯤꯇꯩ ꯂꯣꯟ" data-language-local-name="Manipuri" class="interlanguage-link-target"><span>ꯃꯤꯇꯩ ꯂꯣꯟ</span></a></li><li class="interlanguage-link interwiki-min mw-list-item"><a href="https://min.wikipedia.org/wiki/Talua" title="Talua – Minangkabau" lang="min" hreflang="min" data-title="Talua" data-language-autonym="Minangkabau" data-language-local-name="Minangkabau" class="interlanguage-link-target"><span>Minangkabau</span></a></li><li class="interlanguage-link interwiki-mdf mw-list-item"><a href="https://mdf.wikipedia.org/wiki/%D0%90%D0%BB_(%D1%8D%D1%80%D1%8F%D1%84%D0%BE%D0%BD%D1%8C_%D1%82%D0%BE%D0%BD%D0%B0%D1%84%D0%BD%D0%B5%D0%BC%D0%B0%D0%BA%D1%81)" title="Ал (эряфонь тонафнемакс) – Moksha" lang="mdf" hreflang="mdf" data-title="Ал (эряфонь тонафнемакс)" data-language-autonym="Мокшень" data-language-local-name="Moksha" class="interlanguage-link-target"><span>Мокшень</span></a></li><li class="interlanguage-link interwiki-mn mw-list-item"><a href="https://mn.wikipedia.org/wiki/%D3%A8%D0%BD%D0%B4%D3%A9%D0%B3" title="Өндөг – Mongolian" lang="mn" hreflang="mn" data-title="Өндөг" data-language-autonym="Монгол" data-language-local-name="Mongolian" class="interlanguage-link-target"><span>Монгол</span></a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%A5_(%E1%80%90%E1%80%AD%E1%80%9B%E1%80%85%E1%80%B9%E1%80%86%E1%80%AC%E1%80%94%E1%80%BA)" title="ဥ (တိရစ္ဆာန်) – Burmese" lang="my" hreflang="my" data-title="ဥ (တိရစ္ဆာန်)" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Burmese" class="interlanguage-link-target"><span>မြန်မာဘာသာ</span></a></li><li class="interlanguage-link interwiki-fj mw-list-item"><a href="https://fj.wikipedia.org/wiki/Yaloka" title="Yaloka – Fijian" lang="fj" hreflang="fj" data-title="Yaloka" data-language-autonym="Na Vosa Vakaviti" data-language-local-name="Fijian" class="interlanguage-link-target"><span>Na Vosa Vakaviti</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Ei_(dier)" title="Ei (dier) – Dutch" lang="nl" hreflang="nl" data-title="Ei (dier)" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ne mw-list-item"><a href="https://ne.wikipedia.org/wiki/%E0%A4%85%E0%A4%A8%E0%A5%8D%E0%A4%A1%E0%A4%BE" title="अन्डा – Nepali" lang="ne" hreflang="ne" data-title="अन्डा" data-language-autonym="नेपाली" data-language-local-name="Nepali" class="interlanguage-link-target"><span>नेपाली</span></a></li><li class="interlanguage-link interwiki-new mw-list-item"><a href="https://new.wikipedia.org/wiki/%E0%A4%96%E0%A5%87%E0%A4%81%E0%A4%AF%E0%A5%8D" title="खेँय् – Newari" lang="new" hreflang="new" data-title="खेँय्" data-language-autonym="नेपाल भाषा" data-language-local-name="Newari" class="interlanguage-link-target"><span>नेपाल भाषा</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E5%8D%B5" title="卵 – Japanese" lang="ja" hreflang="ja" data-title="卵" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-nap mw-list-item"><a href="https://nap.wikipedia.org/wiki/Ovo" title="Ovo – Neapolitan" lang="nap" hreflang="nap" data-title="Ovo" data-language-autonym="Napulitano" data-language-local-name="Neapolitan" class="interlanguage-link-target"><span>Napulitano</span></a></li><li class="interlanguage-link interwiki-frr mw-list-item"><a href="https://frr.wikipedia.org/wiki/Ai" title="Ai – Northern Frisian" lang="frr" hreflang="frr" data-title="Ai" data-language-autonym="Nordfriisk" data-language-local-name="Northern Frisian" class="interlanguage-link-target"><span>Nordfriisk</span></a></li><li class="interlanguage-link interwiki-no badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://no.wikipedia.org/wiki/Egg" title="Egg – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Egg" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target"><span>Norsk bokmål</span></a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Egg" title="Egg – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Egg" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target"><span>Norsk nynorsk</span></a></li><li class="interlanguage-link interwiki-nrm mw-list-item"><a href="https://nrm.wikipedia.org/wiki/Oeu" title="Oeu – Norman" lang="nrf" hreflang="nrf" data-title="Oeu" data-language-autonym="Nouormand" data-language-local-name="Norman" class="interlanguage-link-target"><span>Nouormand</span></a></li><li class="interlanguage-link interwiki-mhr mw-list-item"><a href="https://mhr.wikipedia.org/wiki/%D0%9C%D1%83%D0%BD%D0%BE" title="Муно – Eastern Mari" lang="mhr" hreflang="mhr" data-title="Муно" data-language-autonym="Олык марий" data-language-local-name="Eastern Mari" class="interlanguage-link-target"><span>Олык марий</span></a></li><li class="interlanguage-link interwiki-or mw-list-item"><a href="https://or.wikipedia.org/wiki/%E0%AC%85%E0%AC%A3%E0%AD%8D%E0%AC%A1%E0%AC%BE_(%E0%AC%9C%E0%AD%80%E0%AC%AC_%E0%AC%AC%E0%AC%BF%E0%AC%9C%E0%AD%8D%E0%AC%9E%E0%AC%BE%E0%AC%A8)" title="ଅଣ୍ଡା (ଜୀବ ବିଜ୍ଞାନ) – Odia" lang="or" hreflang="or" data-title="ଅଣ୍ଡା (ଜୀବ ବିଜ୍ଞାନ)" data-language-autonym="ଓଡ଼ିଆ" data-language-local-name="Odia" class="interlanguage-link-target"><span>ଓଡ଼ିଆ</span></a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Tuxum" title="Tuxum – Uzbek" lang="uz" hreflang="uz" data-title="Tuxum" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target"><span>Oʻzbekcha / ўзбекча</span></a></li><li class="interlanguage-link interwiki-pa mw-list-item"><a href="https://pa.wikipedia.org/wiki/%E0%A8%86%E0%A8%82%E0%A8%A1%E0%A8%BE" title="ਆਂਡਾ – Punjabi" lang="pa" hreflang="pa" data-title="ਆਂਡਾ" data-language-autonym="ਪੰਜਾਬੀ" data-language-local-name="Punjabi" class="interlanguage-link-target"><span>ਪੰਜਾਬੀ</span></a></li><li class="interlanguage-link interwiki-pnb mw-list-item"><a href="https://pnb.wikipedia.org/wiki/%D8%A2%D9%86%DA%88%D8%A7" title="آنڈا – Western Punjabi" lang="pnb" hreflang="pnb" data-title="آنڈا" data-language-autonym="پنجابی" data-language-local-name="Western Punjabi" class="interlanguage-link-target"><span>پنجابی</span></a></li><li class="interlanguage-link interwiki-koi mw-list-item"><a href="https://koi.wikipedia.org/wiki/%D0%9A%D0%BE%D0%BB%D1%8C%D1%82%D1%8C" title="Кольть – Komi-Permyak" lang="koi" hreflang="koi" data-title="Кольть" data-language-autonym="Перем коми" data-language-local-name="Komi-Permyak" class="interlanguage-link-target"><span>Перем коми</span></a></li><li class="interlanguage-link interwiki-pcd mw-list-item"><a href="https://pcd.wikipedia.org/wiki/U%C3%AB" title="Uë – Picard" lang="pcd" hreflang="pcd" data-title="Uë" data-language-autonym="Picard" data-language-local-name="Picard" class="interlanguage-link-target"><span>Picard</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Jajo_(biologia)" title="Jajo (biologia) – Polish" lang="pl" hreflang="pl" data-title="Jajo (biologia)" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Ovo" title="Ovo – Portuguese" lang="pt" hreflang="pt" data-title="Ovo" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Ou" title="Ou – Romanian" lang="ro" hreflang="ro" data-title="Ou" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-qu mw-list-item"><a href="https://qu.wikipedia.org/wiki/Runtu" title="Runtu – Quechua" lang="qu" hreflang="qu" data-title="Runtu" data-language-autonym="Runa Simi" data-language-local-name="Quechua" class="interlanguage-link-target"><span>Runa Simi</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%AF%D0%B9%D1%86%D0%BE" title="Яйцо – Russian" lang="ru" hreflang="ru" data-title="Яйцо" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sah mw-list-item"><a href="https://sah.wikipedia.org/wiki/%D0%A1%D1%8B%D0%BC%D1%8B%D1%8B%D1%82" title="Сымыыт – Yakut" lang="sah" hreflang="sah" data-title="Сымыыт" data-language-autonym="Саха тыла" data-language-local-name="Yakut" class="interlanguage-link-target"><span>Саха тыла</span></a></li><li class="interlanguage-link interwiki-sat mw-list-item"><a href="https://sat.wikipedia.org/wiki/%E1%B1%B5%E1%B1%A4%E1%B1%9E%E1%B1%A4" title="ᱵᱤᱞᱤ – Santali" lang="sat" hreflang="sat" data-title="ᱵᱤᱞᱤ" data-language-autonym="ᱥᱟᱱᱛᱟᱲᱤ" data-language-local-name="Santali" class="interlanguage-link-target"><span>ᱥᱟᱱᱛᱟᱲᱤ</span></a></li><li class="interlanguage-link interwiki-sco mw-list-item"><a href="https://sco.wikipedia.org/wiki/Egg" title="Egg – Scots" lang="sco" hreflang="sco" data-title="Egg" data-language-autonym="Scots" data-language-local-name="Scots" class="interlanguage-link-target"><span>Scots</span></a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Veza" title="Veza – Albanian" lang="sq" hreflang="sq" data-title="Veza" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target"><span>Shqip</span></a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Ovu_(biolugg%C3%ACa)" title="Ovu (bioluggìa) – Sicilian" lang="scn" hreflang="scn" data-title="Ovu (bioluggìa)" data-language-autonym="Sicilianu" data-language-local-name="Sicilian" class="interlanguage-link-target"><span>Sicilianu</span></a></li><li class="interlanguage-link interwiki-si mw-list-item"><a href="https://si.wikipedia.org/wiki/%E0%B6%B6%E0%B7%92%E0%B6%AD%E0%B7%8A%E0%B6%AD%E0%B6%BB%E0%B6%BA" title="බිත්තරය – Sinhala" lang="si" hreflang="si" data-title="බිත්තරය" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target"><span>සිංහල</span></a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Egg_(biology)" title="Egg (biology) – Simple English" lang="en-simple" hreflang="en-simple" data-title="Egg (biology)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target"><span>Simple English</span></a></li><li class="interlanguage-link interwiki-sd mw-list-item"><a href="https://sd.wikipedia.org/wiki/%D8%A2%D9%86%D9%88" title="آنو – Sindhi" lang="sd" hreflang="sd" data-title="آنو" data-language-autonym="سنڌي" data-language-local-name="Sindhi" class="interlanguage-link-target"><span>سنڌي</span></a></li><li class="interlanguage-link interwiki-sk mw-list-item"><a href="https://sk.wikipedia.org/wiki/Vajce" title="Vajce – Slovak" lang="sk" hreflang="sk" data-title="Vajce" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target"><span>Slovenčina</span></a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Jajce" title="Jajce – Slovenian" lang="sl" hreflang="sl" data-title="Jajce" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target"><span>Slovenščina</span></a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%DA%BE%DB%8E%D9%84%DA%A9%DB%95" title="ھێلکە – Central Kurdish" lang="ckb" hreflang="ckb" data-title="ھێلکە" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target"><span>کوردی</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%88%D0%B0%D1%98%D0%B5" title="Јаје – Serbian" lang="sr" hreflang="sr" data-title="Јаје" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Jaje" title="Jaje – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Jaje" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target"><span>Srpskohrvatski / српскохрватски</span></a></li><li class="interlanguage-link interwiki-su mw-list-item"><a href="https://su.wikipedia.org/wiki/Endog" title="Endog – Sundanese" lang="su" hreflang="su" data-title="Endog" data-language-autonym="Sunda" data-language-local-name="Sundanese" class="interlanguage-link-target"><span>Sunda</span></a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Muna" title="Muna – Finnish" lang="fi" hreflang="fi" data-title="Muna" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target"><span>Suomi</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/%C3%84gg" title="Ägg – Swedish" lang="sv" hreflang="sv" data-title="Ägg" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target"><span>Svenska</span></a></li><li class="interlanguage-link interwiki-tl mw-list-item"><a href="https://tl.wikipedia.org/wiki/Itlog" title="Itlog – Tagalog" lang="tl" hreflang="tl" data-title="Itlog" data-language-autonym="Tagalog" data-language-local-name="Tagalog" class="interlanguage-link-target"><span>Tagalog</span></a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%AE%E0%AF%81%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AF%88" title="முட்டை – Tamil" lang="ta" hreflang="ta" data-title="முட்டை" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target"><span>தமிழ்</span></a></li><li class="interlanguage-link interwiki-tt mw-list-item"><a href="https://tt.wikipedia.org/wiki/%D0%99%D0%BE%D0%BC%D1%8B%D1%80%D0%BA%D0%B0" title="Йомырка – Tatar" lang="tt" hreflang="tt" data-title="Йомырка" data-language-autonym="Татарча / tatarça" data-language-local-name="Tatar" class="interlanguage-link-target"><span>Татарча / tatarça</span></a></li><li class="interlanguage-link interwiki-tay mw-list-item"><a href="https://tay.wikipedia.org/wiki/bazing" title="bazing – Atayal" lang="tay" hreflang="tay" data-title="bazing" data-language-autonym="Tayal" data-language-local-name="Atayal" class="interlanguage-link-target"><span>Tayal</span></a></li><li class="interlanguage-link interwiki-te mw-list-item"><a href="https://te.wikipedia.org/wiki/%E0%B0%97%E0%B1%81%E0%B0%A1%E0%B1%8D%E0%B0%A1%E0%B1%81" title="గుడ్డు – Telugu" lang="te" hreflang="te" data-title="గుడ్డు" data-language-autonym="తెలుగు" data-language-local-name="Telugu" class="interlanguage-link-target"><span>తెలుగు</span></a></li><li class="interlanguage-link interwiki-tg mw-list-item"><a href="https://tg.wikipedia.org/wiki/%D0%A2%D1%83%D1%85%D0%BC" title="Тухм – Tajik" lang="tg" hreflang="tg" data-title="Тухм" data-language-autonym="Тоҷикӣ" data-language-local-name="Tajik" class="interlanguage-link-target"><span>Тоҷикӣ</span></a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Yumurta_(biyoloji)" title="Yumurta (biyoloji) – Turkish" lang="tr" hreflang="tr" data-title="Yumurta (biyoloji)" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target"><span>Türkçe</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%AF%D0%B9%D1%86%D0%B5" title="Яйце – Ukrainian" lang="uk" hreflang="uk" data-title="Яйце" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D8%A7%D9%86%DA%88%D8%A7" title="انڈا – Urdu" lang="ur" hreflang="ur" data-title="انڈا" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target"><span>اردو</span></a></li><li class="interlanguage-link interwiki-za mw-list-item"><a href="https://za.wikipedia.org/wiki/Gyaeq" title="Gyaeq – Zhuang" lang="za" hreflang="za" data-title="Gyaeq" data-language-autonym="Vahcuengh" data-language-local-name="Zhuang" class="interlanguage-link-target"><span>Vahcuengh</span></a></li><li class="interlanguage-link interwiki-vec mw-list-item"><a href="https://vec.wikipedia.org/wiki/V%C3%B3vo" title="Vóvo – Venetian" lang="vec" hreflang="vec" data-title="Vóvo" data-language-autonym="Vèneto" data-language-local-name="Venetian" class="interlanguage-link-target"><span>Vèneto</span></a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Tr%E1%BB%A9ng_(sinh_h%E1%BB%8Dc)" title="Trứng (sinh học) – Vietnamese" lang="vi" hreflang="vi" data-title="Trứng (sinh học)" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target"><span>Tiếng Việt</span></a></li><li class="interlanguage-link interwiki-vo mw-list-item"><a href="https://vo.wikipedia.org/wiki/N%C3%B6g" title="Nög – Volapük" lang="vo" hreflang="vo" data-title="Nög" data-language-autonym="Volapük" data-language-local-name="Volapük" class="interlanguage-link-target"><span>Volapük</span></a></li><li class="interlanguage-link interwiki-fiu-vro mw-list-item"><a href="https://fiu-vro.wikipedia.org/wiki/Muna" title="Muna – Võro" lang="vro" hreflang="vro" data-title="Muna" data-language-autonym="Võro" data-language-local-name="Võro" class="interlanguage-link-target"><span>Võro</span></a></li><li class="interlanguage-link interwiki-wa mw-list-item"><a href="https://wa.wikipedia.org/wiki/O%C3%BB_(zolodjeye)" title="Oû (zolodjeye) – Walloon" lang="wa" hreflang="wa" data-title="Oû (zolodjeye)" data-language-autonym="Walon" data-language-local-name="Walloon" class="interlanguage-link-target"><span>Walon</span></a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Bunay" title="Bunay – Waray" lang="war" hreflang="war" data-title="Bunay" data-language-autonym="Winaray" data-language-local-name="Waray" class="interlanguage-link-target"><span>Winaray</span></a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E8%9B%8B" title="蛋 – Wu" lang="wuu" hreflang="wuu" data-title="蛋" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target"><span>吴语</span></a></li><li class="interlanguage-link interwiki-yi mw-list-item"><a href="https://yi.wikipedia.org/wiki/%D7%90%D7%99%D7%99" title="איי – Yiddish" lang="yi" hreflang="yi" data-title="איי" data-language-autonym="ייִדיש" data-language-local-name="Yiddish" class="interlanguage-link-target"><span>ייִדיש</span></a></li><li class="interlanguage-link interwiki-yo mw-list-item"><a href="https://yo.wikipedia.org/wiki/%E1%BA%B8yin" title="Ẹyin – Yoruba" lang="yo" hreflang="yo" data-title="Ẹyin" data-language-autonym="Yorùbá" data-language-local-name="Yoruba" class="interlanguage-link-target"><span>Yorùbá</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E8%86%A5" title="膥 – Cantonese" lang="yue" hreflang="yue" data-title="膥" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target"><span>粵語</span></a></li><li class="interlanguage-link interwiki-bat-smg mw-list-item"><a href="https://bat-smg.wikipedia.org/wiki/Kiau%C5%A1is" title="Kiaušis – Samogitian" lang="sgs" hreflang="sgs" data-title="Kiaušis" data-language-autonym="Žemaitėška" data-language-local-name="Samogitian" class="interlanguage-link-target"><span>Žemaitėška</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E5%8D%B5" title="卵 – Chinese" lang="zh" hreflang="zh" data-title="卵" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li><li class="interlanguage-link interwiki-kge mw-list-item"><a href="https://kge.wikipedia.org/wiki/Hatoluy" title="Hatoluy – Komering" lang="kge" hreflang="kge" data-title="Hatoluy" data-language-autonym="Kumoring" data-language-local-name="Komering" class="interlanguage-link-target"><span>Kumoring</span></a></li><li class="interlanguage-link interwiki-mos mw-list-item"><a href="https://mos.wikipedia.org/wiki/Gelle" title="Gelle – Mossi" lang="mos" hreflang="mos" data-title="Gelle" data-language-autonym="Moore" data-language-local-name="Mossi" class="interlanguage-link-target"><span>Moore</span></a></li><li class="interlanguage-link interwiki-syl mw-list-item"><a href="https://syl.wikipedia.org/wiki/%EA%A0%84%EA%A0%98%EA%A0%86%EA%A0%92%EA%A0%A3" title="ꠄꠘ꠆ꠒꠣ – Sylheti" lang="syl" hreflang="syl" data-title="ꠄꠘ꠆ꠒꠣ" data-language-autonym="ꠍꠤꠟꠐꠤ" data-language-local-name="Sylheti" class="interlanguage-link-target"><span>ꠍꠤꠟꠐꠤ</span></a></li><li class="interlanguage-link interwiki-tdd mw-list-item"><a href="https://tdd.wikipedia.org/wiki/%E1%A5%91%E1%A5%AD%E1%A5%B1" title="ᥑᥭᥱ – Tai Nuea" lang="tdd" hreflang="tdd" data-title="ᥑᥭᥱ" data-language-autonym="ᥖᥭᥰ ᥖᥬᥲ ᥑᥨᥒᥰ" data-language-local-name="Tai Nuea" class="interlanguage-link-target"><span>ᥖᥭᥰ ᥖᥬᥲ ᥑᥨᥒᥰ</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q17147#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div 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encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Organic vessel in which an embryo first begins to develop</div> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">This article is about biological eggs. For eggs as food, see <a href="/wiki/Eggs_as_food" title="Eggs as food">Eggs as food</a>. For other uses, see <a href="/wiki/Egg_(disambiguation)" class="mw-disambig" title="Egg (disambiguation)">Egg (disambiguation)</a>.</div> <p class="mw-empty-elt"> </p> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-More_citations_needed plainlinks metadata ambox ambox-content ambox-Refimprove" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>needs additional citations for <a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">verification</a></b>.<span class="hide-when-compact"> Please help <a href="/wiki/Special:EditPage/Egg" title="Special:EditPage/Egg">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">adding citations to reliable sources</a>. Unsourced material may be challenged and removed.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Egg%22">"Egg"</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Egg%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Egg%22&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Egg%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Egg%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Egg%22&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">February 2019</span>)</i></span><span class="hide-when-compact"><i> (<small><a href="/wiki/Help:Maintenance_template_removal" title="Help:Maintenance template removal">Learn how and when to remove this message</a></small>)</i></span></div></td></tr></tbody></table> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Adolphe_Millot_oeufs-fixed.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Adolphe_Millot_oeufs-fixed.jpg/250px-Adolphe_Millot_oeufs-fixed.jpg" decoding="async" width="220" height="292" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/54/Adolphe_Millot_oeufs-fixed.jpg/330px-Adolphe_Millot_oeufs-fixed.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/54/Adolphe_Millot_oeufs-fixed.jpg/500px-Adolphe_Millot_oeufs-fixed.jpg 2x" data-file-width="5618" data-file-height="7456" /></a><figcaption>Eggs of various <a href="/wiki/Bird" title="Bird">birds</a>, <a href="/wiki/Turtle" title="Turtle">a reptile</a>, various <a href="/wiki/Cartilaginous_fish" class="mw-redirect" title="Cartilaginous fish">cartilaginous fish</a>, a <a href="/wiki/Cephalopod" title="Cephalopod">cuttlefish</a> and various <a href="/wiki/Butterflies_and_moths" class="mw-redirect" title="Butterflies and moths">butterflies and moths</a>. (Click on image for key)</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Chicken_egg_diagram.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/20/Chicken_egg_diagram.svg/220px-Chicken_egg_diagram.svg.png" decoding="async" width="220" height="189" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/20/Chicken_egg_diagram.svg/330px-Chicken_egg_diagram.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/20/Chicken_egg_diagram.svg/440px-Chicken_egg_diagram.svg.png 2x" data-file-width="700" data-file-height="600" /></a><figcaption>Diagram of a fertilized <a href="/wiki/Chicken" title="Chicken">chicken</a> egg in its ninth day. Membranes: allantois, chorion, amnion, and vitellus/yolk.</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Six_eggs_views_from_the_top_on_a_white_background.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/Six_eggs_views_from_the_top_on_a_white_background.jpg/220px-Six_eggs_views_from_the_top_on_a_white_background.jpg" decoding="async" width="220" height="175" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/Six_eggs_views_from_the_top_on_a_white_background.jpg/330px-Six_eggs_views_from_the_top_on_a_white_background.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/26/Six_eggs_views_from_the_top_on_a_white_background.jpg/440px-Six_eggs_views_from_the_top_on_a_white_background.jpg 2x" data-file-width="3811" data-file-height="3024" /></a><figcaption>Six commercial chicken eggs — view from the top against a white background</figcaption></figure> <p>An <b>egg</b> is an organic vessel grown by an animal to carry a possibly <a href="/wiki/Fertilization" class="mw-redirect" title="Fertilization">fertilized</a> <a href="/wiki/Egg_cell" title="Egg cell">egg cell</a> (a <a href="/wiki/Zygote" title="Zygote">zygote</a>) and to <a href="/wiki/Egg_incubation" title="Egg incubation">incubate</a> from it an <a href="/wiki/Embryo" title="Embryo">embryo</a> within the egg until the embryo has become an animal <a href="/wiki/Fetus" title="Fetus">fetus</a> that can survive on its own, at which point the animal hatches. </p><p>Most <a href="/wiki/Arthropod" title="Arthropod">arthropods</a>, <a href="/wiki/Vertebrates" class="mw-redirect" title="Vertebrates">vertebrates</a> (excluding <a href="/wiki/Live-bearing_mammal" class="mw-redirect" title="Live-bearing mammal">live-bearing mammals</a>), and <a href="/wiki/Mollusca" title="Mollusca">mollusks</a> lay eggs, although some, such as <a href="/wiki/Scorpion" title="Scorpion">scorpions</a>, do not. </p><p><a href="/wiki/Reptile" title="Reptile">Reptile</a> eggs, <a href="/wiki/Bird_egg" title="Bird egg">bird eggs</a>, and <a href="/wiki/Monotreme" title="Monotreme">monotreme</a> eggs are laid out of water and are surrounded by a protective <a href="/wiki/Eggshell" title="Eggshell">shell</a>, either flexible or inflexible. Eggs laid on land or in nests are usually kept within a warm and favorable temperature range while the embryo grows. When the embryo is adequately developed it hatches, i.e., breaks out of the egg's shell. Some embryos have a temporary <a href="/wiki/Egg_tooth" title="Egg tooth">egg tooth</a> they use to crack, pip, or break the eggshell or covering. </p><p>The largest recorded egg is from a <a href="/wiki/Whale_shark" title="Whale shark">whale shark</a> and was 30 cm × 14 cm × 9 cm (11.8 in × 5.5 in × 3.5 in) in size.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Whale shark eggs typically hatch within the <a href="/wiki/Mother" title="Mother">mother</a>. At 1.5 kg (3.3 lb) and up to 17.8 cm × 14 cm (7.0 in × 5.5 in), the <a href="/wiki/Ostrich" title="Ostrich">ostrich</a> egg is the largest egg of any living bird,<sup id="cite_ref-Khanna2005_2-0" class="reference"><a href="#cite_note-Khanna2005-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 130">: 130 </span></sup> though the extinct <a href="/wiki/Elephant_bird" title="Elephant bird">elephant bird</a> and some <a href="/wiki/Non-avian_dinosaur" class="mw-redirect" title="Non-avian dinosaur">non-avian dinosaurs</a> laid larger eggs. The <a href="/wiki/Bee_hummingbird" title="Bee hummingbird">bee hummingbird</a> produces the smallest known bird egg, which measures between 6.35–11.4 millimetres (0.250–0.449 in) long and weighs half of a gram (around 0.02 oz).<sup id="cite_ref-Khanna2005_2-1" class="reference"><a href="#cite_note-Khanna2005-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><sup class="reference nowrap"><span title="Page / location: 132">: 132 </span></sup> Some eggs laid by reptiles and most fish, amphibians, insects, and other <a href="/wiki/Invertebrate" title="Invertebrate">invertebrates</a> can be even smaller. </p><p>Reproductive structures similar to the egg in other <a href="/wiki/Kingdom_(biology)" title="Kingdom (biology)">kingdoms</a> are termed "<a href="/wiki/Spore" title="Spore">spores</a>", or in <a href="/wiki/Spermatophyte" class="mw-redirect" title="Spermatophyte">spermatophytes</a> "<a href="/wiki/Seed" title="Seed">seeds</a>", or in <a href="/wiki/Gametophyte" title="Gametophyte">gametophytes</a> "egg cells". </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Eggs_of_different_animal_groups">Eggs of different animal groups</h2></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951" /><div role="note" class="hatnote navigation-not-searchable">Further information: <a href="/wiki/Egg_cell" title="Egg cell">Egg cell</a></div> <p>Several major groups of animals typically have readily distinguishable eggs. </p> <table class="wikitable"> <caption>Overview of eggs from various animals </caption> <tbody><tr> <th><a href="/wiki/Class_(biology)" title="Class (biology)">Class</a> </th> <th>Types of eggs </th> <th>Development </th></tr> <tr> <td><a href="/wiki/Agnatha" title="Agnatha">Jawless fish</a> </td> <td>Mesolecithal eggs, especially large in <a href="/wiki/Hagfish" title="Hagfish">hagfish</a><sup id="cite_ref-Hildebrand_3-0" class="reference"><a href="#cite_note-Hildebrand-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </td> <td><a href="/wiki/Larval" class="mw-redirect" title="Larval">Larval</a> stage in <a href="/wiki/Lamprey" title="Lamprey">lampreys</a>, direct development in hagfish.<sup id="cite_ref-Gorbman_4-0" class="reference"><a href="#cite_note-Gorbman-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources"><span title="This citation requires a reference to the specific page or range of pages in which the material appears. (January 2023)">page needed</span></a></i>]</sup> </td></tr> <tr> <td><a href="/wiki/Chondrichthyes" title="Chondrichthyes">Cartilaginous fish</a> </td> <td>Macrolecithal eggs with <a href="/wiki/Egg_case_(Chondrichthyes)" title="Egg case (Chondrichthyes)">egg capsule</a><sup id="cite_ref-Hildebrand_3-1" class="reference"><a href="#cite_note-Hildebrand-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </td> <td>Direct development, <a href="/wiki/Viviparity" title="Viviparity">viviparity</a> in some species<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citing_sources" title="Wikipedia:Citing sources"><span title="This citation requires a reference to the specific page or range of pages in which the material appears. (January 2023)">page needed</span></a></i>]</sup> </td></tr> <tr> <td><a href="/wiki/Osteichthyes" title="Osteichthyes">Bony fish</a> </td> <td>Macrolecithal eggs, small to medium size, large eggs in the <a href="/wiki/Coelacanth" title="Coelacanth">coelacanth</a><sup id="cite_ref-Romer_&_Parson_7-0" class="reference"><a href="#cite_note-Romer_&_Parson-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </td> <td><a href="/wiki/Larva" title="Larva">Larval</a> stage, <a href="/wiki/Ovoviviparity" title="Ovoviviparity">ovovivipary</a> in some species.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Amphibian" title="Amphibian">Amphibians</a> </td> <td>Medium-sized mesolecithal eggs in all species.<sup id="cite_ref-Romer_&_Parson_7-1" class="reference"><a href="#cite_note-Romer_&_Parson-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </td> <td><a href="/wiki/Tadpole" title="Tadpole">Tadpole</a> stage, direct development in some species.<sup id="cite_ref-Romer_&_Parson_7-2" class="reference"><a href="#cite_note-Romer_&_Parson-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/Reptiles" class="mw-redirect" title="Reptiles">Reptiles</a> </td> <td>Large macrolecithal eggs, develop independent of water.<sup id="cite_ref-Stewart_J._R._1997_9-0" class="reference"><a href="#cite_note-Stewart_J._R._1997-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </td> <td>Direct development, some ovoviviparious </td></tr> <tr> <td><a href="/wiki/Birds" class="mw-redirect" title="Birds">Birds</a> </td> <td>Large to very large macrolecithal eggs in all species, develop independent of water.<sup id="cite_ref-Hildebrand_3-2" class="reference"><a href="#cite_note-Hildebrand-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </td> <td>The young more or less fully developed, no distinct larval stage. </td></tr> <tr> <td><a href="/wiki/Mammals" class="mw-redirect" title="Mammals">Mammals</a> </td> <td>Macrolecithal eggs in <a href="/wiki/Monotreme" title="Monotreme">monotremes</a> and <a href="/wiki/Marsupial" title="Marsupial">marsupials</a>, extreme microlecithal eggs in <a href="/wiki/Placental_mammals" class="mw-redirect" title="Placental mammals">placental mammals</a>.<sup id="cite_ref-Hildebrand_3-3" class="reference"><a href="#cite_note-Hildebrand-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </td> <td>Young little developed with indistinct larval stage in monotremes and marsupials, direct development in placentals. </td></tr></tbody></table> <p><span class="anchor" id="Fish_eggs"></span><span class="anchor" id="Amphibian_eggs"></span> </p> <div class="mw-heading mw-heading3"><h3 id="Fish_and_amphibian_eggs">Fish and amphibian eggs</h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951" /><div role="note" class="hatnote navigation-not-searchable">"Fish egg" redirects here. For fish eggs as food, see <a href="/wiki/Roe" title="Roe">Roe</a>.</div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951" /><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Ichthyoplankton" title="Ichthyoplankton">Ichthyoplankton</a> and <a href="/wiki/Spawn_(biology)" class="mw-redirect" title="Spawn (biology)">Spawn (biology)</a></div> <style data-mw-deduplicate="TemplateStyles:r1273380762/mw-parser-output/.tmulti">.mw-parser-output .tmulti .multiimageinner{display:flex;flex-direction:column}.mw-parser-output .tmulti .trow{display:flex;flex-direction:row;clear:left;flex-wrap:wrap;width:100%;box-sizing:border-box}.mw-parser-output .tmulti .tsingle{margin:1px;float:left}.mw-parser-output .tmulti .theader{clear:both;font-weight:bold;text-align:center;align-self:center;background-color:transparent;width:100%}.mw-parser-output .tmulti .thumbcaption{background-color:transparent}.mw-parser-output .tmulti .text-align-left{text-align:left}.mw-parser-output .tmulti .text-align-right{text-align:right}.mw-parser-output .tmulti .text-align-center{text-align:center}@media all and (max-width:720px){.mw-parser-output .tmulti .thumbinner{width:100%!important;box-sizing:border-box;max-width:none!important;align-items:center}.mw-parser-output .tmulti .trow{justify-content:center}.mw-parser-output .tmulti .tsingle{float:none!important;max-width:100%!important;box-sizing:border-box;text-align:center}.mw-parser-output .tmulti .tsingle .thumbcaption{text-align:left}.mw-parser-output .tmulti .trow>.thumbcaption{text-align:center}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .tmulti .multiimageinner span:not(.skin-invert-image):not(.skin-invert):not(.bg-transparent) img{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .tmulti .multiimageinner span:not(.skin-invert-image):not(.skin-invert):not(.bg-transparent) img{background-color:white}}</style><div class="thumb tmulti tleft"><div class="thumbinner multiimageinner" style="width:224px;max-width:224px"><div class="trow"><div class="tsingle" style="width:222px;max-width:222px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Salmoneggskils.jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/08/Salmoneggskils.jpg/220px-Salmoneggskils.jpg" decoding="async" width="220" height="155" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/08/Salmoneggskils.jpg/330px-Salmoneggskils.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/08/Salmoneggskils.jpg/440px-Salmoneggskils.jpg 2x" data-file-width="1860" data-file-height="1308" /></a></span></div><div class="thumbcaption">Salmon eggs in different stages of development. In some only a few cells grow on top of the <a href="/wiki/Yolk" title="Yolk">yolk</a>, in the lower right the blood vessels surround the yolk and in the upper left the black eyes are visible.</div></div></div><div class="trow"><div class="tsingle" style="width:222px;max-width:222px"><div class="thumbimage"><span typeof="mw:File"><a href="/wiki/File:Fish_Egg_Diagram_(1).jpg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Fish_Egg_Diagram_%281%29.jpg/220px-Fish_Egg_Diagram_%281%29.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Fish_Egg_Diagram_%281%29.jpg/330px-Fish_Egg_Diagram_%281%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Fish_Egg_Diagram_%281%29.jpg/440px-Fish_Egg_Diagram_%281%29.jpg 2x" data-file-width="960" data-file-height="720" /></a></span></div><div class="thumbcaption">Diagram of a fish egg: A. <a href="/wiki/Vitelline_membrane" title="Vitelline membrane">vitelline membrane</a> B. <a href="/wiki/Chorion" title="Chorion">chorion</a> C. <a href="/wiki/Egg_yolk" class="mw-redirect" title="Egg yolk">yolk</a> D. oil globule E. <a href="/wiki/Perivitelline_space" title="Perivitelline space">perivitelline space</a> F. <a href="/wiki/Embryo" title="Embryo">embryo</a></div></div></div></div></div> <figure class="mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Salmonlarvakils.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Salmonlarvakils.jpg/150px-Salmonlarvakils.jpg" decoding="async" width="150" height="219" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Salmonlarvakils.jpg/225px-Salmonlarvakils.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e2/Salmonlarvakils.jpg/300px-Salmonlarvakils.jpg 2x" data-file-width="1249" data-file-height="1821" /></a><figcaption><a href="/wiki/Salmon" title="Salmon">Salmon</a> fry hatching. The larva has grown around the remains of the yolk and the remains of the soft, transparent egg are discarded.</figcaption></figure> <p>The most common reproductive strategy for <a href="/wiki/Fish" title="Fish">fish</a> is known as <a href="/wiki/Oviparity" title="Oviparity">oviparity</a>, in which the female lays undeveloped eggs that are externally fertilized by a male. Typically large numbers of eggs are laid at one time (an adult female <a href="/wiki/Cod" title="Cod">cod</a> can produce 4–6 million eggs in one spawning) and the eggs are then left to develop without parental care. When the larvae hatch from the egg, they often carry the remains of the yolk in a yolk sac which continues to nourish the larvae for a few days as they learn how to swim. Once the yolk is consumed, there is a critical point after which they must learn how to hunt and feed or they will die. </p><p>A few fish, notably the <a href="/wiki/Ray_(fish)" class="mw-redirect" title="Ray (fish)">rays</a> and most <a href="/wiki/Shark" title="Shark">sharks</a> use <a href="/wiki/Ovoviviparity" title="Ovoviviparity">ovoviviparity</a> in which the eggs are fertilized and develop internally. However, the larvae still grow inside the egg consuming the egg's yolk and without any direct nourishment from the mother. The mother then gives birth to relatively mature young. In certain instances, the physically most developed offspring will devour its smaller siblings for further nutrition while still within the mother's body. This is known as <a href="/wiki/Cannibalism_(zoology)#Intrauterine_cannibalism" class="mw-redirect" title="Cannibalism (zoology)">intrauterine cannibalism</a>. </p><p>In certain scenarios, some fish such as the <a href="/wiki/Hammerhead_shark" title="Hammerhead shark">hammerhead shark</a> and <a href="/wiki/Reef_shark_(SIA)" class="mw-redirect" title="Reef shark (SIA)">reef shark</a> are <a href="/wiki/Viviparity" title="Viviparity">viviparous</a>, with the egg being fertilized and developed internally, but with the mother also providing direct nourishment. </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:RanaArvalisMatingPlusSpawn.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3a/RanaArvalisMatingPlusSpawn.jpg/220px-RanaArvalisMatingPlusSpawn.jpg" decoding="async" width="220" height="153" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3a/RanaArvalisMatingPlusSpawn.jpg/330px-RanaArvalisMatingPlusSpawn.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3a/RanaArvalisMatingPlusSpawn.jpg/440px-RanaArvalisMatingPlusSpawn.jpg 2x" data-file-width="2000" data-file-height="1388" /></a><figcaption><a href="/wiki/Moor_frog" title="Moor frog">Moor frog</a> eggs utilize <a href="/wiki/Glycan" title="Glycan">glycans</a> to form a hydrophilic jelly coat that protects the egg</figcaption></figure> <p>The eggs of fish and <a href="/wiki/Amphibian" title="Amphibian">amphibians</a> are jellylike. Cartilaginous fish (sharks, skates, rays, chimaeras) eggs are fertilized internally and exhibit a wide variety of both internal and external embryonic development. Most fish species spawn eggs that are fertilized externally, typically with the male inseminating the eggs after the female lays them. These eggs do not have a shell and would dry out in the air. Even air-breathing amphibians lay their eggs in water, or in protective foam as with the Coast foam-nest treefrog, <i><a href="/wiki/Chiromantis_xerampelina" class="mw-redirect" title="Chiromantis xerampelina">Chiromantis xerampelina</a></i>. </p> <div class="mw-heading mw-heading3"><h3 id="Bird_eggs">Bird eggs</h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951" /><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Bird_egg" title="Bird egg">Bird egg</a></div> <p>Bird eggs are laid by females and <a href="/wiki/Incubate_(bird)" class="mw-redirect" title="Incubate (bird)">incubated</a> for a time that varies according to the species; a single young hatches from each egg. Average <a href="/wiki/Clutch_(eggs)" title="Clutch (eggs)">clutch sizes</a> range from one (as in <a href="/wiki/Condor" title="Condor">condors</a>) to about 17 (the <a href="/wiki/Grey_partridge" title="Grey partridge">grey partridge</a>). Some birds lay eggs even when not fertilized (e.g. <a href="/wiki/Chicken" title="Chicken">hens</a>); it is not uncommon for pet owners to find their lone bird nesting on a clutch of unfertilized eggs, which are sometimes called wind-eggs. </p> <div class="mw-heading mw-heading4"><h4 id="Colours">Colours</h4></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Uria_aalge_MHNT_Box_Rouzic.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/Uria_aalge_MHNT_Box_Rouzic.jpg/220px-Uria_aalge_MHNT_Box_Rouzic.jpg" decoding="async" width="220" height="151" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/Uria_aalge_MHNT_Box_Rouzic.jpg/330px-Uria_aalge_MHNT_Box_Rouzic.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c4/Uria_aalge_MHNT_Box_Rouzic.jpg/440px-Uria_aalge_MHNT_Box_Rouzic.jpg 2x" data-file-width="5385" data-file-height="3698" /></a><figcaption><a href="/wiki/Guillemot" title="Guillemot">Guillemot</a> eggs</figcaption></figure> <p>The default colour of vertebrate eggs is the white of the <a href="/wiki/Calcium_carbonate" title="Calcium carbonate">calcium carbonate</a> from which the shells are made, but some birds, mainly <a href="/wiki/Passerine" title="Passerine">passerines</a>, produce coloured eggs. The colour comes from <a href="/wiki/Pigment" title="Pigment">pigments</a> deposited on top of the calcium carbonate base; <a href="/wiki/Biliverdin" title="Biliverdin">biliverdin</a> and its zinc <a href="/wiki/Chelate" class="mw-redirect" title="Chelate">chelate</a>, and <a href="/wiki/Bilirubin" title="Bilirubin">bilirubin</a>, give a green or blue ground colour, while <a href="/wiki/Protoporphyrin_IX" title="Protoporphyrin IX">protoporphyrin IX</a> produces reds and browns as a ground colour or as spotting.<sup id="cite_ref-ABCN_10-0" class="reference"><a href="#cite_note-ABCN-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>Non-passerines typically have white eggs, except in some ground-nesting groups such as the <a href="/wiki/Charadriiformes" title="Charadriiformes">Charadriiformes</a>, <a href="/wiki/Sandgrouse" title="Sandgrouse">sandgrouse</a> and <a href="/wiki/Nightjar" title="Nightjar">nightjars</a>, where camouflage is necessary, and some <a href="/wiki/Brood_parasite" class="mw-redirect" title="Brood parasite">parasitic</a> <a href="/wiki/Cuckoo" title="Cuckoo">cuckoos</a> which have to match the passerine host's egg. Most passerines, in contrast, lay coloured eggs, even if there is no need of cryptic colors. However, some have suggested that the protoporphyrin markings on passerine eggs actually act to reduce brittleness by acting as a solid-state lubricant.<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> If there is insufficient calcium available in the local soil, the egg shell may be thin, especially in a circle around the broad end. Protoporphyrin speckling compensates for this, and increases inversely to the amount of calcium in the soil.<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </p><p>For the same reason, later eggs in a clutch are more spotted than early ones as the female's store of calcium is depleted. </p><p>The color of individual eggs is also genetically influenced, and appears to be inherited through the mother only, suggesting that the <a href="/wiki/Gene" title="Gene">gene</a> responsible for pigmentation is on the sex-determining <a href="/wiki/W_chromosome" class="mw-redirect" title="W chromosome">W chromosome</a> (female birds are WZ, males ZZ). </p><p>It used to be thought that color was applied to the shell immediately before laying, but subsequent research shows that coloration is an integral part of the development of the shell, with the same protein responsible for depositing calcium carbonate, or protoporphyrins when there is a lack of that mineral. </p><p>In species such as the <a href="/wiki/Common_guillemot" class="mw-redirect" title="Common guillemot">common guillemot</a>, which nest in large groups, each female's eggs have very different markings, making it easier for females to identify their own eggs on the crowded cliff ledges on which they breed. </p><p><a href="/wiki/Yolk" title="Yolk">Yolks</a> of birds' eggs are yellow from <a href="/wiki/Carotenoid" title="Carotenoid">carotenoids</a>, it is affected by their living conditions and diet.<sup id="cite_ref-ABCN_10-1" class="reference"><a href="#cite_note-ABCN-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Shell">Shell</h4></div> <p>Bird eggshells are diverse. For example: </p> <ul><li><a href="/wiki/Cormorant" title="Cormorant">cormorant</a> eggs are rough and chalky</li> <li><a href="/wiki/Tinamou" title="Tinamou">tinamou</a> eggs are shiny</li> <li><a href="/wiki/Duck" title="Duck">duck</a> eggs are oily and waterproof</li> <li><a href="/wiki/Cassowary" title="Cassowary">cassowary</a> eggs are heavily pitted</li></ul> <p>Tiny pores in bird eggshells allow the embryo to breathe. The <a href="/wiki/Chicken" title="Chicken">domestic hen</a>'s egg has around 7000 pores.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> </p><p>Some bird eggshells have a coating of <a href="/wiki/Vaterite" title="Vaterite">vaterite</a> <a href="/wiki/Spherule" class="mw-redirect" title="Spherule">spherules</a>, which is a rare polymorph of calcium carbonate. In <a href="/wiki/Greater_Ani" class="mw-redirect" title="Greater Ani">Greater Ani</a> <i>Crotophaga major</i> this vaterite coating is thought to act as a shock absorber, protecting the calcite shell from fracture during incubation, such as colliding with other eggs in the nest.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Shape">Shape</h4></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><span class="mw-3d-wrapper" data-label="3D"><a href="/wiki/File:Oeuf.stl" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/Oeuf.stl/250px-Oeuf.stl.png" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/Oeuf.stl/330px-Oeuf.stl.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/26/Oeuf.stl/500px-Oeuf.stl.png 2x" data-file-width="5120" data-file-height="2880" /></a></span><figcaption>A <a href="/wiki/3D_modeling" title="3D modeling">3D model</a> of an egg</figcaption></figure> <p>Most bird eggs have an <a href="/wiki/Oval_(geometry)" class="mw-redirect" title="Oval (geometry)">oval shape</a>, with one end rounded and the other more pointed. This shape results from the egg being forced through the <a href="/wiki/Oviduct" title="Oviduct">oviduct</a>. Muscles contract the oviduct behind the egg, pushing it forward. The egg's wall is still shapeable, and the pointed end develops at the back.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (December 2022)">citation needed</span></a></i>]</sup> One hypothesis is that long, pointy eggs are an incidental consequence of having a streamlined body typical of birds with strong flying abilities; flight narrows the oviduct, which changes the type of egg a bird can lay.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p><p>Cliff-nesting birds often have highly <a href="/wiki/Cone" title="Cone">conical</a> eggs. They are less likely to roll off, tending instead to roll around in a tight circle; this trait is likely to have arisen due to evolution via natural selection. In contrast, many hole-nesting birds have nearly <a href="/wiki/Sphere" title="Sphere">spherical</a> eggs.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Predation">Predation</h4></div> <p>Many animals feed on eggs. For example, principal predators of the <a href="/wiki/American_black_oystercatcher" class="mw-redirect" title="American black oystercatcher">black oystercatcher</a>'s eggs include <a href="/wiki/Raccoon" title="Raccoon">raccoons</a>, <a href="/wiki/Skunk" title="Skunk">skunks</a>, <a href="/wiki/Mink" title="Mink">mink</a>, river and sea <a href="/wiki/Otter" title="Otter">otters</a>, <a href="/wiki/Gull" title="Gull">gulls</a>, <a href="/wiki/Crow" title="Crow">crows</a> and <a href="/wiki/Fox" title="Fox">foxes</a>. The <a href="/wiki/Stoat" title="Stoat">stoat</a> (<i>Mustela erminea</i>) and <a href="/wiki/Long-tailed_weasel" title="Long-tailed weasel">long-tailed weasel</a> (<i>M. frenata</i>) steal ducks' eggs. <a href="/wiki/Snake" title="Snake">Snakes</a> of the genera <i><a href="/wiki/Dasypeltis" title="Dasypeltis">Dasypeltis</a></i> and <i><a href="/wiki/Elachistodon" class="mw-redirect" title="Elachistodon">Elachistodon</a></i> specialize in eating eggs. </p><p><a href="/wiki/Brood_parasitism" title="Brood parasitism">Brood parasitism</a> occurs in birds when one species lays its eggs in the nest of another. In some cases, the host's eggs are removed or eaten by the female, or expelled by her chick. Brood parasites include the <a href="/wiki/Cowbird" title="Cowbird">cowbirds</a> and many Old World <a href="/wiki/Cuckoo" title="Cuckoo">cuckoos</a>. </p> <div class="mw-heading mw-heading3"><h3 id="Amniote_eggs_and_embryos">Amniote eggs and embryos</h3></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Snapping_turtle_eggs_md.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Snapping_turtle_eggs_md.jpg/250px-Snapping_turtle_eggs_md.jpg" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Snapping_turtle_eggs_md.jpg/330px-Snapping_turtle_eggs_md.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Snapping_turtle_eggs_md.jpg/500px-Snapping_turtle_eggs_md.jpg 2x" data-file-width="1531" data-file-height="1021" /></a><figcaption><a href="/wiki/Turtle" title="Turtle">Turtle</a> eggs in a nest dug by a female common snapping turtle (<i><a href="/wiki/Common_snapping_turtle" title="Common snapping turtle">Chelydra serpentina</a></i>)</figcaption></figure> <p>Like amphibians, <a href="/wiki/Amniote" title="Amniote">amniotes</a> are air-breathing <a href="/wiki/Vertebrate" title="Vertebrate">vertebrates</a>, but they have complex eggs or <a href="/wiki/Embryo" title="Embryo">embryos</a>, including an <a href="/wiki/Amniotic_membrane" class="mw-redirect" title="Amniotic membrane">amniotic membrane</a>. Amniotes include <a href="/wiki/Reptile" title="Reptile">reptiles</a> (including dinosaurs and their descendants, birds) and mammals. </p><p>Reptile eggs are often rubbery and are always initially white. They are able to survive in the air. Often the sex of the developing embryo is determined by the temperature of the surroundings, with cooler temperatures favouring males. Not all reptiles lay eggs; some are <a href="/wiki/Viviparous" class="mw-redirect" title="Viviparous">viviparous</a> ("live birth"). </p><p>Dinosaurs laid eggs, some of which have been preserved as petrified fossils. </p><p>Among mammals, early extinct species laid eggs, as do <a href="/wiki/Platypus" title="Platypus">platypuses</a> and <a href="/wiki/Echidna" title="Echidna">echidnas</a> (spiny anteaters). Platypuses and two genera of echidna are Australian <a href="/wiki/Monotremes" class="mw-redirect" title="Monotremes">monotremes</a>. <a href="/wiki/Marsupial" title="Marsupial">Marsupial</a> and <a href="/wiki/Placental" class="mw-redirect" title="Placental">placental</a> mammals do not lay eggs, but their unborn young do have the complex tissues that identify amniotes. </p> <div class="mw-heading mw-heading3"><h3 id="Mammalian_eggs">Mammalian eggs</h3></div> <p>The eggs of the egg-laying mammals (the <a href="/wiki/Platypus" title="Platypus">platypus</a> and the <a href="/wiki/Echidna" title="Echidna">echidnas</a>) are macrolecithal eggs very much like those of <a href="/wiki/Reptile" title="Reptile">reptiles</a>. The eggs of <a href="/wiki/Marsupial" title="Marsupial">marsupials</a> are likewise macrolecithal, but rather small, and develop inside the body of the female, but do not form a <a href="/wiki/Placenta" title="Placenta">placenta</a>. The young are born at a very early stage, and can be classified as a "<a href="/wiki/Larva" title="Larva">larva</a>" in the biological sense.<sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </p><p>In <a href="/wiki/Placental_mammal" class="mw-redirect" title="Placental mammal">placental mammals</a>, the egg itself is void of yolk, but develops an <a href="/wiki/Umbilical_cord" title="Umbilical cord">umbilical cord</a> from structures that in reptiles would form the yolk sac. Receiving nutrients from the mother, the fetus completes the development while inside the uterus. </p> <div class="mw-heading mw-heading3"><h3 id="Invertebrate_eggs">Invertebrate eggs</h3></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Editing_Image-Acanthodoris_lutea_laying_eggs_2.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/33/Editing_Image-Acanthodoris_lutea_laying_eggs_2.jpg/220px-Editing_Image-Acanthodoris_lutea_laying_eggs_2.jpg" decoding="async" width="220" height="165" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/33/Editing_Image-Acanthodoris_lutea_laying_eggs_2.jpg/330px-Editing_Image-Acanthodoris_lutea_laying_eggs_2.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/33/Editing_Image-Acanthodoris_lutea_laying_eggs_2.jpg/440px-Editing_Image-Acanthodoris_lutea_laying_eggs_2.jpg 2x" data-file-width="1777" data-file-height="1333" /></a><figcaption><a href="/wiki/Orange-peel_doris" class="mw-redirect" title="Orange-peel doris">Orange-peel doris</a> (<i>Acanthodoris lutea</i>), a <a href="/wiki/Nudibranch" title="Nudibranch">nudibranch</a>, in <a href="/wiki/Tide_pool" title="Tide pool">tide pool</a> laying eggs</figcaption></figure> <p>Eggs are common among <a href="/wiki/Invertebrate" title="Invertebrate">invertebrates</a>, including <a href="/wiki/Insect" title="Insect">insects</a>, <a href="/wiki/Spider" title="Spider">spiders</a>, <a href="/wiki/Mollusk" class="mw-redirect" title="Mollusk">mollusks</a>, and <a href="/wiki/Crustacean" title="Crustacean">crustaceans</a>. </p> <div class="mw-heading mw-heading2"><h2 id="Evolution_and_structure">Evolution and structure</h2></div> <p>All sexually reproducing life, including both plants and animals, produces <a href="/wiki/Gametes" class="mw-redirect" title="Gametes">gametes</a>. The male gamete cell, <a href="/wiki/Sperm" title="Sperm">sperm</a>, is usually motile whereas the female gamete cell, the <a href="/wiki/Ovum" class="mw-redirect" title="Ovum">ovum</a>, is generally larger and <a href="https://en.wiktionary.org/wiki/sessile" class="extiw" title="wikt:sessile">sessile</a>. The male and female gametes combine to produce the <a href="/wiki/Zygote" title="Zygote">zygote</a> cell. In <a href="/wiki/Multicellular" class="mw-redirect" title="Multicellular">multicellular</a> organisms, the zygote subsequently divides in an organised manner into smaller more specialised cells, so that this new individual develops into an <a href="/wiki/Embryo" title="Embryo">embryo</a>. In most animals, the embryo is the sessile initial stage of the individual life cycle, and is followed by the emergence (that is, the hatching) of a motile stage. The zygote or the ovum itself or the sessile organic vessel containing the developing embryo may be called the egg. </p><p>A recent proposal suggests that the <a href="/wiki/Phylotype" title="Phylotype">phylotypic</a> animal <a href="/wiki/Body_plan" title="Body plan">body plans</a> originated in cell aggregates before the existence of an egg stage of <a href="/wiki/Developmental_biology" title="Developmental biology">development</a>. Eggs, in this view, were later evolutionary <a href="/wiki/Emergence" title="Emergence">innovations</a>, selected for their role in ensuring genetic uniformity among the cells of incipient multicellular organisms.<sup id="cite_ref-Newman_19-0" class="reference"><a href="#cite_note-Newman-19"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Formation">Formation</h2></div> <p>The cycle of the egg's formation is started by the <a href="/wiki/Gamete" title="Gamete">gamete</a> <a href="/wiki/Ovum" class="mw-redirect" title="Ovum">ovum</a> being released (<a href="/wiki/Ovulation" title="Ovulation">ovulated</a>) and egg formation being started. The finished egg is then <a href="/wiki/Oviposition" class="mw-redirect" title="Oviposition">ovipositioned</a> and eventual <a href="/wiki/Egg_incubation" title="Egg incubation">egg incubation</a> can start. </p> <div class="mw-heading mw-heading2"><h2 id="Scientific_classifications">Scientific classifications</h2></div> <p>Scientists often classify animal reproduction according to the degree of development that occurs before the new individuals are expelled from the adult body, and by the yolk which the egg provides to nourish the embryo. </p> <div class="mw-heading mw-heading3"><h3 id="Egg_size_and_yolk">Egg size and yolk</h3></div> <p><a href="/wiki/Vertebrate" title="Vertebrate">Vertebrate</a> eggs can be classified by the relative amount of <a href="/wiki/Yolk" title="Yolk">yolk</a>. Simple eggs with little yolk are called <i>microlecithal</i>, medium-sized eggs with some yolk are called <i>mesolecithal</i>, and large eggs with a large concentrated yolk are called <i>macrolecithal</i>.<sup id="cite_ref-Romer_&_Parson_7-3" class="reference"><a href="#cite_note-Romer_&_Parson-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> This classification of eggs is based on the eggs of <a href="/wiki/Chordata" class="mw-redirect" title="Chordata">chordates</a>, though the basic principle extends to the whole <a href="/wiki/Animalia" class="mw-redirect" title="Animalia">animal kingdom</a>. </p> <div class="mw-heading mw-heading4"><h4 id="Microlecithal">Microlecithal</h4></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Toxocara_embryonated_eggs.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Toxocara_embryonated_eggs.jpg/220px-Toxocara_embryonated_eggs.jpg" decoding="async" width="220" height="166" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Toxocara_embryonated_eggs.jpg/330px-Toxocara_embryonated_eggs.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/3b/Toxocara_embryonated_eggs.jpg/440px-Toxocara_embryonated_eggs.jpg 2x" data-file-width="797" data-file-height="600" /></a><figcaption>Microlecithal eggs from the <a href="/wiki/Nematoda" class="mw-redirect" title="Nematoda">roundworm</a> <i><a href="/wiki/Toxocara" class="mw-redirect" title="Toxocara">Toxocara</a></i></figcaption></figure> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Paragonimus_westermani_01.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Paragonimus_westermani_01.jpg/220px-Paragonimus_westermani_01.jpg" decoding="async" width="220" height="147" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Paragonimus_westermani_01.jpg/330px-Paragonimus_westermani_01.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/ff/Paragonimus_westermani_01.jpg/440px-Paragonimus_westermani_01.jpg 2x" data-file-width="1767" data-file-height="1178" /></a><figcaption>Microlecithal eggs from the <a href="/wiki/Flatworm" title="Flatworm">flatworm</a> <i><a href="/wiki/Paragonimus_westermani" title="Paragonimus westermani">Paragonimus westermani</a></i></figcaption></figure> <p>Small eggs with little yolk are called microlecithal. The yolk is evenly distributed, so the cleavage of the egg cell cuts through and divides the egg into cells of fairly similar sizes. In <a href="/wiki/Sponges" class="mw-redirect" title="Sponges">sponges</a> and <a href="/wiki/Cnidaria" title="Cnidaria">cnidarians</a>, the dividing eggs develop directly into a simple larva, rather like a <a href="/wiki/Morula" class="mw-redirect" title="Morula">morula</a> with <a href="/wiki/Cilium" title="Cilium">cilia</a>. In cnidarians, this stage is called the <a href="/wiki/Planula" title="Planula">planula</a>, and either develops directly into the adult animals or forms new adult individuals through a process of <a href="/wiki/Budding" title="Budding">budding</a>.<sup id="cite_ref-20" class="reference"><a href="#cite_note-20"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup> </p><p>Microlecithal eggs require minimal yolk mass. Such eggs are found in <a href="/wiki/Flatworm" title="Flatworm">flatworms</a>, <a href="/wiki/Roundworm" class="mw-redirect" title="Roundworm">roundworms</a>, <a href="/wiki/Annelid" title="Annelid">annelids</a>, <a href="/wiki/Bivalve" class="mw-redirect" title="Bivalve">bivalves</a>, <a href="/wiki/Echinodermata" class="mw-redirect" title="Echinodermata">echinoderms</a>, the <a href="/wiki/Lancelet" title="Lancelet">lancelet</a> and in most marine <a href="/wiki/Arthropod" title="Arthropod">arthropods</a>.<sup id="cite_ref-Barns_21-0" class="reference"><a href="#cite_note-Barns-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> In anatomically simple animals, such as cnidarians and flatworms, the fetal development can be quite short, and even microlecithal eggs can undergo direct development. These small eggs can be produced in large numbers. In animals with high egg mortality, microlecithal eggs are the norm, as in bivalves and marine arthropods. However, the latter are more complex anatomically than e.g. flatworms, and the small microlecithal eggs do not allow full development. Instead, the eggs hatch into <a href="/wiki/Larva" title="Larva">larvae</a>, which may be markedly different from the adult animal. </p><p>In placental mammals, where the embryo is nourished by the mother throughout the whole fetal period, the egg is reduced in size to essentially a naked egg cell. </p> <div class="mw-heading mw-heading4"><h4 id="Mesolecithal">Mesolecithal</h4></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Frogspawn_closeup.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Frogspawn_closeup.jpg/250px-Frogspawn_closeup.jpg" decoding="async" width="220" height="168" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Frogspawn_closeup.jpg/330px-Frogspawn_closeup.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/7d/Frogspawn_closeup.jpg/500px-Frogspawn_closeup.jpg 2x" data-file-width="666" data-file-height="510" /></a><figcaption><a href="/wiki/Frog" title="Frog">Frogspawn</a> is mesolecithal.</figcaption></figure> <p>Mesolecithal eggs have comparatively more yolk than the microlecithal eggs. The yolk is concentrated in one part of the egg (the <i>vegetal pole</i>), with the <a href="/wiki/Cell_nucleus" title="Cell nucleus">cell nucleus</a> and most of the <a href="/wiki/Cytoplasm" title="Cytoplasm">cytoplasm</a> in the other (the <i>animal pole</i>). The cell cleavage is uneven, and mainly concentrated in the cytoplasma-rich animal pole.<sup id="cite_ref-Hildebrand_3-4" class="reference"><a href="#cite_note-Hildebrand-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>The larger yolk content of the mesolecithal eggs allows for a longer fetal development. Comparatively anatomically simple animals will be able to go through the full development and leave the egg in a form reminiscent of the adult animal. This is the situation found in <a href="/wiki/Hagfish" title="Hagfish">hagfish</a> and some <a href="/wiki/Snail" title="Snail">snails</a>.<sup id="cite_ref-Gorbman_4-1" class="reference"><a href="#cite_note-Gorbman-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Barns_21-1" class="reference"><a href="#cite_note-Barns-21"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> Animals with smaller size eggs or more advanced anatomy will still have a distinct larval stage, though the larva will be basically similar to the adult animal, as in <a href="/wiki/Lamprey" title="Lamprey">lampreys</a>, <a href="/wiki/Coelacanth" title="Coelacanth">coelacanth</a> and the <a href="/wiki/Salamander" title="Salamander">salamanders</a>.<sup id="cite_ref-Hildebrand_3-5" class="reference"><a href="#cite_note-Hildebrand-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading4"><h4 id="Macrolecithal">Macrolecithal</h4></div> <figure class="mw-default-size mw-halign-right" typeof="mw:File/Thumb"><a href="/wiki/File:Tortoise-Hatchling.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Tortoise-Hatchling.jpg/250px-Tortoise-Hatchling.jpg" decoding="async" width="220" height="220" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Tortoise-Hatchling.jpg/330px-Tortoise-Hatchling.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/83/Tortoise-Hatchling.jpg/500px-Tortoise-Hatchling.jpg 2x" data-file-width="1204" data-file-height="1204" /></a><figcaption>A baby <a href="/wiki/Tortoise" title="Tortoise">tortoise</a> begins to emerge "fully developed" from its macrolecithal egg.</figcaption></figure> <p>Eggs with a large yolk are called macrolecithal. The eggs are usually few in number, and the embryos have enough food to go through full fetal development in most groups.<sup id="cite_ref-Romer_&_Parson_7-4" class="reference"><a href="#cite_note-Romer_&_Parson-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> Macrolecithal eggs are only found in selected representatives of two groups: <a href="/wiki/Cephalopod" title="Cephalopod">Cephalopods</a> and <a href="/wiki/Vertebrate" title="Vertebrate">vertebrates</a>.<sup id="cite_ref-Romer_&_Parson_7-5" class="reference"><a href="#cite_note-Romer_&_Parson-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-22" class="reference"><a href="#cite_note-22"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </p><p>Macrolecithal eggs go through a different type of development than other eggs. Due to the large size of the yolk, the cell division can not split up the yolk mass. The fetus instead develops as a plate-like structure on top of the yolk mass, and only envelopes it at a later stage.<sup id="cite_ref-Romer_&_Parson_7-6" class="reference"><a href="#cite_note-Romer_&_Parson-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> A portion of the yolk mass is still present as an external or semi-external <a href="/wiki/Yolk_sac" title="Yolk sac">yolk sac</a> at hatching in many groups. This form of fetal development is common in <a href="/wiki/Bony_fish" class="mw-redirect" title="Bony fish">bony fish</a>, even though their eggs can be quite small. Despite their macrolecithal structure, the small size of the eggs does not allow for direct development, and the eggs hatch to a larval stage ("fry"). In terrestrial animals with macrolecithal eggs, the large volume to surface ratio necessitates structures to aid in transport of oxygen and carbon dioxide, and for storage of waste products so that the embryo does not suffocate or get poisoned from its own waste while inside the egg, see <a href="/wiki/Amniote" title="Amniote">amniote</a>.<sup id="cite_ref-Stewart_J._R._1997_9-1" class="reference"><a href="#cite_note-Stewart_J._R._1997-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p><p>In addition to bony fish and cephalopods, macrolecithal eggs are found in <a href="/wiki/Chondrichthyes" title="Chondrichthyes">cartilaginous fish</a>, <a href="/wiki/Reptile" title="Reptile">reptiles</a>, <a href="/wiki/Bird" title="Bird">birds</a> and <a href="/wiki/Monotreme" title="Monotreme">monotreme</a> mammals.<sup id="cite_ref-Hildebrand_3-6" class="reference"><a href="#cite_note-Hildebrand-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> The eggs of the <a href="/wiki/Coelacanth" title="Coelacanth">coelacanths</a> can reach a size of 9 cm (3.5 in) in diameter, and the young go through full development while in the <a href="/wiki/Uterus" title="Uterus">uterus</a>, living on the copious yolk.<sup id="cite_ref-23" class="reference"><a href="#cite_note-23"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Egg-laying_reproduction">Egg-laying reproduction</h3></div> <p>Animals are commonly classified by their manner of reproduction, at the most general level distinguishing egg-laying (Latin. <i>oviparous</i>) from live-bearing (Latin. <i>viviparous</i>). </p><p>These classifications are divided into more detail according to the development that occurs before the offspring are expelled from the adult's body. Traditionally:<sup id="cite_ref-24" class="reference"><a href="#cite_note-24"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> </p> <ul><li><b>Ovuliparity</b> means the female <a href="/wiki/Spawn_(biology)" class="mw-redirect" title="Spawn (biology)">spawns</a> unfertilized eggs (ova), which must then be externally fertilised. Ovuliparity is typical of <a href="/wiki/Bony_fish" class="mw-redirect" title="Bony fish">bony fish</a>, <a href="/wiki/Anuran" class="mw-redirect" title="Anuran">anurans</a>, echinoderms, bivalves and cnidarians. Most aquatic organisms are ovuliparous. The term is derived from the diminutive meaning "little egg".</li> <li><b>Oviparity</b> is where fertilisation occurs internally and so the eggs laid by the female are zygotes (or newly developing embryos), often with important outer tissues added (for example, in a chicken egg, no part outside of the yolk originates with the zygote). Oviparity is typical of birds, reptiles, some cartilaginous fish and most arthropods. Terrestrial organisms are typically oviparous, with egg-casings that resist evaporation of moisture.</li> <li><b>Ovo-viviparity</b> is where the zygote is retained in the adult's body but there are no <i>trophic</i> (feeding) interactions. That is, the embryo still obtains all of its nutrients from inside the egg. Most live-bearing fish, amphibians or reptiles are actually ovoviviparous. Examples include the reptile <i><a href="/wiki/Anguis_fragilis" class="mw-redirect" title="Anguis fragilis">Anguis fragilis</a></i>, the sea horse (where zygotes are retained in the male's ventral "marsupium"), and the frogs <i>Rhinoderma darwinii</i> (where the eggs develop in the vocal sac) and <i>Rheobatrachus</i> (where the eggs develop in the stomach).</li> <li><b>Histotrophic viviparity</b> means embryos develop in the female's <a href="/wiki/Oviduct" title="Oviduct">oviducts</a> but obtain nutrients by consuming other ova, zygotes or sibling embryos (<a href="/wiki/Oophagy" title="Oophagy">oophagy</a> or <a href="/wiki/Adelphophagy" class="mw-redirect" title="Adelphophagy">adelphophagy</a>). This <a href="/wiki/Intra-uterine_cannibalism" class="mw-redirect" title="Intra-uterine cannibalism">intra-uterine cannibalism</a> occurs in some sharks and in the black salamander <i>Salamandra atra</i>. <a href="/wiki/Marsupials" class="mw-redirect" title="Marsupials">Marsupials</a> excrete a "uterine milk" supplementing the nourishment from the yolk sac.<sup id="cite_ref-25" class="reference"><a href="#cite_note-25"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup></li> <li><b>Hemotrophic viviparity</b> is where nutrients are provided from the female's blood through a designated organ. This most commonly occurs through a <a href="/wiki/Placenta" title="Placenta">placenta</a>, found in <a href="/wiki/Placentalia" title="Placentalia">most mammals</a>. Similar structures are found in some sharks and in the lizard <i>Pseudomoia pagenstecheri</i>.<sup id="cite_ref-26" class="reference"><a href="#cite_note-26"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-27" class="reference"><a href="#cite_note-27"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup> In some <a href="/wiki/Hylidae" title="Hylidae">hylid frogs</a>, the embryo is fed by the mother through specialized <a href="/wiki/Gill" title="Gill">gills</a>.<sup id="cite_ref-28" class="reference"><a href="#cite_note-28"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup></li></ul> <p>The term hemotrophic derives from the Latin for blood-feeding, contrasted with histotrophic for tissue-feeding.<sup id="cite_ref-29" class="reference"><a href="#cite_note-29"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Human_use">Human use</h2></div> <div class="mw-heading mw-heading3"><h3 id="Food">Food</h3></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951" /><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Eggs_as_food" title="Eggs as food">Eggs as food</a></div><style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 0;text-align:center}@media(min-width:500px){.mw-parser-output .side-box-flex{display:flex;align-items:center}.mw-parser-output .side-box-text{flex:1;min-width:0}}@media(min-width:720px){.mw-parser-output .side-box{width:238px}.mw-parser-output .side-box-right{clear:right;float:right;margin-left:1em}.mw-parser-output .side-box-left{margin-right:1em}}</style><style data-mw-deduplicate="TemplateStyles:r1237033735">@media print{body.ns-0 .mw-parser-output .sistersitebox{display:none!important}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .sistersitebox img[src*="Wiktionary-logo-en-v2.svg"]{background-color:white}}</style><div class="side-box side-box-right plainlinks sistersitebox"><style data-mw-deduplicate="TemplateStyles:r1126788409">.mw-parser-output .plainlist ol,.mw-parser-output .plainlist ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style> <div class="side-box-flex"> <div class="side-box-image"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Wikibooks-logo-en-noslogan.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/df/Wikibooks-logo-en-noslogan.svg/40px-Wikibooks-logo-en-noslogan.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/df/Wikibooks-logo-en-noslogan.svg/60px-Wikibooks-logo-en-noslogan.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/df/Wikibooks-logo-en-noslogan.svg/120px-Wikibooks-logo-en-noslogan.svg.png 2x" data-file-width="400" data-file-height="400" /></a></span></div> <div class="side-box-text plainlist">Wikibooks <a href="https://en.wikibooks.org/wiki/Cookbook" class="extiw" title="wikibooks:Cookbook">Cookbook</a> has a recipe/module on <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /><div class="plainlist" style="margin-left: 1.6em;"> <ul><li><i><b><a href="https://en.wikibooks.org/wiki/Cookbook:Egg" class="extiw" title="wikibooks:Cookbook:Egg"> Egg</a></b></i></li></ul> </div></div></div> </div> <p>Eggs laid by many different species, including birds, reptiles, amphibians, and fish, have probably been eaten by people for millennia. Popular choices for egg consumption are chicken, duck, roe, and caviar, but by a wide margin the egg most often humanly consumed is the chicken egg, typically unfertilized. </p> <div class="mw-heading mw-heading4"><h4 id="Eggs_and_Kashrut">Eggs and Kashrut</h4></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951" /><div role="note" class="hatnote navigation-not-searchable">See also: <a href="/wiki/Kashrut#Pareve_foods" title="Kashrut">Kashrut § Pareve foods</a>, and <a href="/wiki/Kosher_foods#Eggs" title="Kosher foods">Kosher foods § Eggs</a></div> <p>According to the <a href="/wiki/Kashrut" title="Kashrut">Kashrut</a>, that is the set of Jewish <a href="/wiki/Taboo_food_and_drink" class="mw-redirect" title="Taboo food and drink">dietary laws</a>, <a href="/wiki/Kosher" class="mw-redirect" title="Kosher">kosher</a> food may be consumed according to <i><a href="/wiki/Halakha" title="Halakha">halakha</a></i> (Jewish law). <a href="/wiki/Egg_(food)" class="mw-redirect" title="Egg (food)">Eggs</a> are considered <i>pareve</i> (neither meat nor dairy) despite being an animal product and can be mixed with either milk or kosher meat.<sup id="cite_ref-30" class="reference"><a href="#cite_note-30"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="Vaccine_manufacture">Vaccine manufacture</h3></div> <p>Many vaccines for infectious diseases are produced in fertile chicken eggs. The basis of this technology was the discovery in 1931 by <a href="/wiki/Alice_Miles_Woodruff" title="Alice Miles Woodruff">Alice Miles Woodruff</a> and <a href="/wiki/Ernest_William_Goodpasture" title="Ernest William Goodpasture">Ernest William Goodpasture</a> at <a href="/wiki/Vanderbilt_University" title="Vanderbilt University">Vanderbilt University</a> that the <a href="/wiki/Rickettsia" title="Rickettsia">rickettsia</a> and <a href="/wiki/Virus" title="Virus">viruses</a> that cause a variety of diseases will grow in chicken embryos. This enabled the development of vaccines against <a href="/wiki/Influenza" title="Influenza">influenza</a>, <a href="/wiki/Chicken_pox" class="mw-redirect" title="Chicken pox">chicken pox</a>, <a href="/wiki/Smallpox" title="Smallpox">smallpox</a>, <a href="/wiki/Yellow_fever" title="Yellow fever">yellow fever</a>, <a href="/wiki/Typhus" title="Typhus">typhus</a>, <a href="/wiki/Rocky_mountain_spotted_fever" class="mw-redirect" title="Rocky mountain spotted fever">Rocky mountain spotted fever</a> and other diseases. </p> <div class="mw-heading mw-heading3"><h3 id="Culture">Culture</h3></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Easter_Egg_Hunt_(5623253840).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Easter_Egg_Hunt_%285623253840%29.jpg/170px-Easter_Egg_Hunt_%285623253840%29.jpg" decoding="async" width="170" height="255" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Easter_Egg_Hunt_%285623253840%29.jpg/255px-Easter_Egg_Hunt_%285623253840%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/ea/Easter_Egg_Hunt_%285623253840%29.jpg/340px-Easter_Egg_Hunt_%285623253840%29.jpg 2x" data-file-width="945" data-file-height="1417" /></a><figcaption>Chocolate <a href="/wiki/Easter_egg" title="Easter egg">Easter eggs</a> hidden as part of an egg hunt</figcaption></figure> <p>Eggs are an important symbol in folklore and mythology, often representing life and rebirth, healing and protection, and sometimes featuring in creation myths.<sup id="cite_ref-31" class="reference"><a href="#cite_note-31"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Egg_decorating" title="Egg decorating">Egg decoration</a> is a common practice in many cultures worldwide. Christians view <a href="/wiki/Easter_egg" title="Easter egg">Easter eggs</a> as symbolic of the resurrection of Jesus Christ.<sup id="cite_ref-32" class="reference"><a href="#cite_note-32"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> A popular Easter tradition in some parts of the world is the decoration of hard-boiled eggs (usually by dyeing, but often by hand-painting or spray-painting). Adults often hide the eggs for children to find, an activity known as an <a href="/wiki/Easter_egg_hunt" class="mw-redirect" title="Easter egg hunt">Easter egg hunt</a>. A similar tradition of egg painting exists in areas of the world influenced by the culture of Persia. Before the spring equinox in the Persian New Year tradition (called Norouz), each family member decorates a hard-boiled egg and sets them together in a bowl. The tradition of a <a href="/wiki/Dancing_egg" title="Dancing egg">dancing egg</a> is held during the feast of Corpus Christi in Catalan cities since the 16th century. It consists of an emptied egg, positioned over the water jet from a fountain, which starts turning without falling.<sup id="cite_ref-33" class="reference"><a href="#cite_note-33"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup><sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Reliable_sources" title="Wikipedia:Reliable sources"><span title="The material near this tag relies on an unreliable source. (February 2025)">unreliable source</span></a></i>]</sup> </p><p>Although a food item, raw eggs are sometimes thrown at houses, cars, or people. This act, known commonly as "<a href="/wiki/Egging" title="Egging">egging</a>" in the various English-speaking countries, is a minor form of vandalism and, therefore, usually a criminal offense and is capable of damaging property (egg whites can degrade certain types of vehicle paint) as well as potentially causing serious eye injury. On Halloween, for example, trick or treaters have been known to throw eggs (and sometimes flour) at property or people from whom they received nothing.<sup class="noprint Inline-Template Template-Fact" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed"><span title="This claim needs references to reliable sources. (January 2019)">citation needed</span></a></i>]</sup> Eggs are also often thrown in protests, as they are inexpensive and nonlethal, yet very messy when broken.<sup id="cite_ref-34" class="reference"><a href="#cite_note-34"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Collecting">Collecting</h2></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951" /><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Oology" title="Oology">Oology</a></div> <p>Egg collecting was a popular hobby in some cultures, including <a href="/wiki/European_Australians" title="European Australians">European Australians</a>. Traditionally, the embryo would be removed before a collector stored the egg shell.<sup id="cite_ref-35" class="reference"><a href="#cite_note-35"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> </p><p>Collecting eggs of wild birds is now banned by many jurisdictions, as the practice can threaten rare species. In the United Kingdom, the practice is prohibited by the Protection of Birds Act 1954 and <a href="/wiki/Wildlife_and_Countryside_Act_1981" title="Wildlife and Countryside Act 1981">Wildlife and Countryside Act 1981</a>.<sup id="cite_ref-36" class="reference"><a href="#cite_note-36"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> However, illegal collection and trading persists. </p><p>Since the protection of wild bird eggs was regulated, early collections have come to the museums as curiosities. For example, the Australian Museum hosts a collection of about 20,000 registered clutches of eggs,<sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup> and the collection in Western Australia Museum has been archived in a gallery.<sup id="cite_ref-38" class="reference"><a href="#cite_note-38"><span class="cite-bracket">[</span>38<span class="cite-bracket">]</span></a></sup> Scientists regard egg collections as a good natural-history data, as the details recorded in the collectors' notes have helped them to understand birds' nesting behaviors.<sup id="cite_ref-39" class="reference"><a href="#cite_note-39"><span class="cite-bracket">[</span>39<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2></div> <style data-mw-deduplicate="TemplateStyles:r1184024115">.mw-parser-output .div-col{margin-top:0.3em;column-width:30em}.mw-parser-output .div-col-small{font-size:90%}.mw-parser-output .div-col-rules{column-rule:1px solid #aaa}.mw-parser-output .div-col dl,.mw-parser-output .div-col ol,.mw-parser-output .div-col ul{margin-top:0}.mw-parser-output .div-col li,.mw-parser-output .div-col dd{page-break-inside:avoid;break-inside:avoid-column}</style><div class="div-col"> <ul><li><a href="/wiki/List_of_egg_topics" title="List of egg topics">List of egg topics</a></li> <li><a href="/wiki/Exoskeleton" title="Exoskeleton">Animal shell</a></li> <li><a href="/wiki/External_morphology_of_Lepidoptera#Egg" title="External morphology of Lepidoptera">Butterfly eggs</a></li> <li><a href="/wiki/Egg_white" title="Egg white">Egg white</a></li> <li><a href="/wiki/Fossil_egg" class="mw-redirect" title="Fossil egg">Fossil egg</a></li> <li><a href="/wiki/Haugh_unit" title="Haugh unit">Haugh unit</a></li> <li><a href="/wiki/Oology" title="Oology">Oology</a></li> <li><a href="/wiki/Oviparous" class="mw-redirect" title="Oviparous">Oviparous</a></li> <li><a href="/wiki/Trophic_egg" title="Trophic egg">Trophic egg</a></li></ul> </div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20140609153809/http://seaworld.org/en/animal-info/animal-bytes/cartilaginous-fish/whale-shark/">"Whale Shark – Cartilaginous Fish"</a>. <a href="/wiki/SeaWorld" 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Retrieved <span class="nowrap">27 June</span> 2014</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Whale+Shark+%E2%80%93+Cartilaginous+Fish&rft.pub=SeaWorld+Parks+%26+Entertainment&rft_id=http%3A%2F%2Fseaworld.org%2Fen%2Fanimal-info%2Fanimal-bytes%2Fcartilaginous-fish%2Fwhale-shark%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AEgg" class="Z3988"></span></span> </li> <li id="cite_note-Khanna2005-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-Khanna2005_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Khanna2005_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFKhanna2005" class="citation book cs1">Khanna, D.R. (2005). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=fDblIChi7KwC&pg=PA130"><i>Biology of Birds</i></a>. New Delhi, India: Discovery Publishing House. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/978-81-7141-933-3" title="Special:BookSources/978-81-7141-933-3"><bdi>978-81-7141-933-3</bdi></a>. <a rel="nofollow" class="external text" href="https://web.archive.org/web/20160510084347/https://books.google.com/books?id=fDblIChi7KwC&pg=PA130">Archived</a> from the original on 10 May 2016.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Biology+of+Birds&rft.place=New+Delhi%2C+India&rft.pub=Discovery+Publishing+House&rft.date=2005&rft.isbn=978-81-7141-933-3&rft.aulast=Khanna&rft.aufirst=D.R.&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DfDblIChi7KwC%26pg%3DPA130&rfr_id=info%3Asid%2Fen.wikipedia.org%3AEgg" class="Z3988"></span></span> </li> <li id="cite_note-Hildebrand-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-Hildebrand_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Hildebrand_3-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Hildebrand_3-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Hildebrand_3-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-Hildebrand_3-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-Hildebrand_3-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-Hildebrand_3-6"><sup><i><b>g</b></i></sup></a></span> <span class="reference-text">Hildebrand, M. & Gonslow, G. 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W.; Potter, I. C. (1971). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=YaPwAAAAMAAJ"><i>The Biology of Lampreys</i></a>. Vol. 2 (1st ed.). New York, USA: Academic Press Inc. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/0-12-324801-9" title="Special:BookSources/0-12-324801-9"><bdi>0-12-324801-9</bdi></a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=The+Biology+of+Lampreys&rft.place=New+York%2C+USA&rft.edition=1st&rft.pub=Academic+Press+Inc.&rft.date=1971&rft.isbn=0-12-324801-9&rft.aulast=Hardisty&rft.aufirst=M.+W.&rft.au=Potter%2C+I.+C.&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DYaPwAAAAMAAJ&rfr_id=info%3Asid%2Fen.wikipedia.org%3AEgg" class="Z3988"></span></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-6">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFCompagno1984" class="citation book cs1">Compagno, Leonard J. V. 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Retrieved <span class="nowrap">2018-03-31</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Atlantic&rft.atitle=The+Lost+Victorian+Art+of+Egg+Collecting&rft.date=2016-03-25&rft.aulast=Golembiewski&rft.aufirst=Kate&rft_id=https%3A%2F%2Fwww.theatlantic.com%2Fscience%2Farchive%2F2016%2F03%2Fthe-lost-victorian-art-of-egg-collecting%2F475476%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3AEgg" class="Z3988"></span></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1235681985" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1237033735" /><div class="side-box side-box-right plainlinks sistersitebox"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1126788409" /> <div class="side-box-flex"> <div class="side-box-image"><span 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style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Eggs" title="Template:Eggs"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Eggs" title="Template talk:Eggs"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Eggs" title="Special:EditPage/Template:Eggs"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Eggs376" style="font-size:114%;margin:0 4em"><a class="mw-selflink selflink">Eggs</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div><a href="/wiki/List_of_egg_topics" title="List of egg topics">List of egg topics</a></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Types</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bird_egg" title="Bird egg">Bird</a></li> <li><a class="mw-selflink-fragment" href="#Fish_and_amphibian_eggs">Fish and amphibian</a></li> <li><a href="/wiki/Monotreme" title="Monotreme">Monotreme</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Egg_fossil" title="Egg fossil">Fossil record</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cephalopod_egg_fossil" title="Cephalopod egg fossil">Cephalopod</a></li> <li><a href="/wiki/Fish_egg_fossil" title="Fish egg fossil">Fish</a></li> <li><a href="/wiki/Reptile_egg_fossil" title="Reptile egg fossil">Reptile</a> (<a href="/wiki/Dinosaur_egg" title="Dinosaur egg">dinosaur</a>)</li> <li><a href="/wiki/Egg_paleopathology" title="Egg paleopathology">Pathology</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Biology</th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Egg_allergy" title="Egg allergy">Allergy</a></li> <li><a href="/wiki/Egg_cell" title="Egg cell">Egg cell</a></li> <li><a href="/wiki/Embryo" title="Embryo">Embryo</a></li> <li><a href="/wiki/Ichthyoplankton" title="Ichthyoplankton">Ichthyoplankton</a></li> <li><a href="/wiki/Oogamy" title="Oogamy">Oogamy</a></li> <li><a href="/wiki/Oogenesis" title="Oogenesis">Oogenesis</a></li> <li><a href="/wiki/Ootheca" title="Ootheca">Ootheca</a></li> <li><a href="/wiki/Ovary" title="Ovary">Ovary</a></li> <li><a href="/wiki/Oviduct" title="Oviduct">Oviduct</a></li> <li><a href="/wiki/Oviparity" title="Oviparity">Oviparity</a></li> <li><a href="/wiki/Ovoviviparity" title="Ovoviviparity">Ovoviviparity</a></li> <li><a href="/wiki/Ovulation" title="Ovulation">Ovulation</a></li> <li><a href="/wiki/Spawn_(biology)" class="mw-redirect" title="Spawn (biology)">Spawn</a></li> <li><a href="/wiki/Egg_tooth" title="Egg tooth">Tooth</a></li> <li><a href="/wiki/Trophic_egg" title="Trophic egg">Trophic</a></li> <li><a href="/wiki/Zygote" title="Zygote">Zygote</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Components</th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Yolk" title="Yolk">Yolk</a></li> <li><a href="/wiki/Egg_white" title="Egg white">White</a></li> <li><a href="/wiki/Eggshell" title="Eggshell">Shell</a> and <a href="/wiki/Eggshell_membrane" title="Eggshell membrane">membrane</a></li> <li><a href="/wiki/Chalaza" title="Chalaza">Chalaza</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Eggs_as_food" title="Eggs as food">As food</a></th><td class="navbox-list-with-group navbox-list navbox-odd hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_egg_dishes" title="List of egg dishes">List of egg dishes</a></li> <li><a href="/wiki/Balut_(food)" title="Balut (food)">Balut</a></li> <li><a href="/wiki/Eggs_Benedict" title="Eggs Benedict">Benedict</a></li> <li><a href="/wiki/Boiled_egg" title="Boiled egg">Boiled</a></li> <li><a href="/wiki/Century_egg" title="Century egg">Century</a></li> <li><a href="/wiki/Coddled_egg" title="Coddled egg">Coddled</a></li> <li><a href="/wiki/List_of_custard_desserts" title="List of custard desserts">Custard desserts</a></li> <li><a href="/wiki/Deep_fried_egg" title="Deep fried egg">Deep fried</a></li> <li><a href="/wiki/Deviled_egg" title="Deviled egg">Deviled</a></li> <li><a href="/wiki/Eggnog" title="Eggnog">Eggnog</a></li> <li><a href="/wiki/Fried_egg" title="Fried egg">Fried</a></li> <li><a href="/wiki/Iron_egg" title="Iron egg">Iron</a></li> <li><a href="/wiki/Meringue" title="Meringue">Meringue</a></li> <li><a href="/wiki/Omelette" title="Omelette">Omelette</a></li> <li><a href="/wiki/Onsen_tamago" title="Onsen tamago">Onsen tamago</a></li> <li><a href="/wiki/Poached_egg" title="Poached egg">Poached</a></li> <li><a href="/wiki/Powdered_egg" class="mw-redirect" title="Powdered egg">Powdered</a></li> <li><a href="/wiki/Pickled_egg" title="Pickled egg">Pickled</a></li> <li><a href="/wiki/Quiche" title="Quiche">Quiche</a></li> <li><a href="/wiki/Roe" title="Roe">Roe</a></li> <li><a href="/wiki/Egg_salad" title="Egg salad">Salad</a></li> <li><a href="/wiki/Salted_duck_egg" title="Salted duck egg">Salted</a></li> <li><a href="/wiki/Scotch_egg" title="Scotch egg">Scotch</a></li> <li><a href="/wiki/Scrambled_eggs" title="Scrambled eggs">Scrambled</a></li> <li><a href="/wiki/Shirred_eggs" title="Shirred eggs">Shirred</a></li> <li><a href="/wiki/Smoked_egg" title="Smoked egg">Smoked</a></li> <li><a href="/wiki/Souffl%C3%A9" title="Soufflé">Soufflé</a></li> <li><a href="/wiki/Tea_egg" title="Tea egg">Tea</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Category:Eggs_in_culture" title="Category:Eggs in culture">In culture</a></th><td class="navbox-list-with-group navbox-list navbox-even hlist" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Egg_balancing" title="Egg balancing">Balancing</a></li> <li><a href="/wiki/Egg_carton" title="Egg carton">Carton</a></li> <li><a href="/wiki/Egg_decorating" title="Egg decorating">Decorating</a></li> <li><a href="/wiki/Easter_egg" title="Easter egg">Easter egg</a></li> <li><a href="/wiki/Egg-and-spoon_race" title="Egg-and-spoon race">Egg-and-spoon race</a></li> <li><a href="/wiki/Egg_drop_competition" title="Egg drop competition">Egg drop competition</a></li> <li><a href="/wiki/Egging" title="Egging">Egging</a></li> <li><a href="/wiki/Faberg%C3%A9_egg" title="Fabergé egg">Fabergé egg</a></li> <li><a href="/wiki/Free-range_egg" class="mw-redirect" title="Free-range egg">Free range</a></li> <li><a href="/wiki/HowToBasic" title="HowToBasic">HowToBasic</a></li> <li><a href="/wiki/Humpty_Dumpty" title="Humpty Dumpty">Humpty Dumpty</a></li> <li><a href="/wiki/Egg_hunt" title="Egg hunt">Hunt</a></li> <li><a href="/wiki/Oology" title="Oology">Oology</a></li> <li><a href="/wiki/Oomancy" title="Oomancy">Oomancy</a></li> <li><a href="/wiki/Organic_egg_production" title="Organic egg production">Organic</a></li> <li><a href="/wiki/Category:Egg_organizations" title="Category:Egg organizations">Organizations</a></li> <li><a href="/wiki/Ovo_vegetarianism" title="Ovo vegetarianism">Ovo vegetarianism</a></li> <li><a href="/wiki/Pysanka" class="mw-redirect" title="Pysanka">Pysanka</a> <ul><li><a href="/wiki/Vegreville_egg" title="Vegreville egg">Vegreville egg</a></li></ul></li> <li><a href="/wiki/Egg_rolling" title="Egg rolling">Rolling</a></li> <li><a href="/wiki/Egg_tapping" title="Egg tapping">Tapping</a></li> <li><a href="/wiki/Egg_tossing" title="Egg tossing">Tossing</a></li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <b><a href="/wiki/Category:Eggs" title="Category:Eggs">Category</a></b></li> <li><span class="noviewer" typeof="mw:File"><span title="Commons page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/20px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/40px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> <b><a href="https://commons.wikimedia.org/wiki/Category:Eggs" class="extiw" title="commons:Category:Eggs">Commons</a></b></li></ul> </div></td></tr></tbody></table></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235" /></div><div role="navigation" class="navbox" aria-labelledby="Birds_(class:_Aves)683" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374" /><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231" /><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Birds" title="Template:Birds"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Birds" title="Template talk:Birds"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Birds" title="Special:EditPage/Template:Birds"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Birds_(class:_Aves)683" style="font-size:114%;margin:0 4em"><a href="/wiki/Bird" title="Bird">Birds</a> (<a href="/wiki/Class_(biology)" title="Class (biology)">class</a>: Aves)</div></th></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><a href="/wiki/Outline_of_birds" title="Outline of birds">Outline</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Bird_anatomy" title="Bird anatomy">Anatomy</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Beak" title="Beak">Beak</a></li> <li><a href="/wiki/Avian_brain" title="Avian brain">Brain</a></li> <li><a href="/wiki/Crop_(anatomy)#Birds" title="Crop (anatomy)">Crop</a> <ul><li><a href="/wiki/Crop_milk" title="Crop milk">milk</a></li></ul></li> <li><a href="/wiki/Dactyly#bird_digits" title="Dactyly">Dactyly</a></li> <li><a href="/wiki/Bird_egg" title="Bird egg">Eggs</a></li> <li><a href="/wiki/Feather" title="Feather">Feathers</a></li> <li><a href="/wiki/Bird_flight" title="Bird flight">Flight</a></li> <li><a href="/wiki/Uropygial_gland" title="Uropygial gland">Preen gland</a></li> <li><a href="/wiki/Plumage" title="Plumage">Plumage</a></li> <li><a href="/wiki/Bird_vision" title="Bird vision">Vision</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Bird_behaviour" class="mw-redirect" title="Bird behaviour">Behaviour</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bird_vocalization" title="Bird vocalization">Singing</a></li> <li><a href="/wiki/Bird_intelligence" title="Bird intelligence">Intelligence</a></li> <li><a href="/wiki/Bird_migration" title="Bird migration">Migration</a></li> <li><a href="/wiki/Avian_foraging" title="Avian foraging">Foraging</a></li> <li><a href="/wiki/Sexual_selection_in_birds" title="Sexual selection in birds">Sexual selection</a></li> <li><a href="/wiki/Lek_mating" title="Lek mating">Lek mating</a></li> <li><a href="/wiki/Seabird_breeding_behavior" title="Seabird breeding behavior">Seabird breeding</a></li> <li><a href="/wiki/Egg_incubation#Avian_incubation" title="Egg incubation">Incubation</a></li> <li><a href="/wiki/Brood_parasite" class="mw-redirect" title="Brood parasite">Brood parasites</a></li> <li><a href="/wiki/Bird_nest" title="Bird nest">Nesting</a></li> <li><a href="/wiki/Bird_hybrid" title="Bird hybrid">Hybrids</a></li> <li><a href="/wiki/Bird_colony" title="Bird colony">Colony</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Evolution" title="Evolution">Evolution</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Origin_of_birds" title="Origin of birds">Origin of birds</a> <ul><li><a href="/wiki/Theropoda" title="Theropoda">Theropoda</a></li> <li><a href="/wiki/Dinosaur" title="Dinosaur">dinosaurs</a></li></ul></li> <li><a href="/wiki/Origin_of_avian_flight" title="Origin of avian flight">Origin of flight</a></li> <li><a href="/wiki/Evolution_of_birds" title="Evolution of birds">Evolution of birds</a></li> <li><a href="/wiki/Darwin%27s_finches" title="Darwin's finches">Darwin's finches</a></li> <li><a href="/wiki/Seabird" title="Seabird">Seabirds</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_fossil_bird_genera" title="List of fossil bird genera">Fossil birds</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Archaeopteryx" title="Archaeopteryx">Archaeopteryx</a></i></li> <li><a href="/wiki/Omnivoropterygidae" title="Omnivoropterygidae">Omnivoropterygiformes</a></li> <li><a href="/wiki/Jeholornithidae" title="Jeholornithidae">Jeholornithidae</a></li> <li><a href="/wiki/Confuciusornithiformes" class="mw-redirect" title="Confuciusornithiformes">Confuciusornithiformes</a></li> <li><a href="/wiki/Enantiornithes" title="Enantiornithes">Enantiornithes</a></li> <li><a href="/wiki/Chaoyangiformes" class="mw-redirect" title="Chaoyangiformes">Chaoyangiformes</a></li> <li><a href="/wiki/Patagopterygiformes" title="Patagopterygiformes">Patagopterygiformes</a></li> <li><a href="/wiki/Ambiortiformes" title="Ambiortiformes">Ambiortiformes</a></li> <li><a href="/wiki/Songlingornithiformes" class="mw-redirect" title="Songlingornithiformes">Songlingornithiformes</a></li> <li><a href="/wiki/Hongshanornithidae" title="Hongshanornithidae">Hongshanornithidae</a></li> <li><a href="/wiki/Gansus" title="Gansus">Gansuiformes</a></li> <li><a href="/wiki/Ichthyornithes" title="Ichthyornithes">Ichthyornithiformes</a></li> <li><a href="/wiki/Hesperornithes" title="Hesperornithes">Hesperornithes</a></li> <li><a href="/wiki/Lithornithidae" title="Lithornithidae">Lithornithiformes</a></li> <li><a href="/wiki/Moa" title="Moa">Dinornithiformes</a></li> <li><a href="/wiki/Elephant_bird" title="Elephant bird">Aepyornithiformes</a></li> <li><a href="/wiki/Gastornithiformes" title="Gastornithiformes">Gastornithiformes</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Human_uses_of_birds" title="Human uses of birds">Human <br />interaction</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Bird_ringing" title="Bird ringing">Ringing</a></li> <li><a href="/wiki/Ornithology" title="Ornithology">Ornithology</a></li> <li><a href="/wiki/Ornithomancy" title="Ornithomancy">Ornithomancy</a></li> <li><a href="/wiki/Bird_collections" title="Bird collections">Bird collections</a></li> <li><a href="/wiki/Birdwatching" title="Birdwatching">Birdwatching</a> <ul><li><a href="/wiki/Big_year" title="Big year">big year</a></li></ul></li> <li><a href="/wiki/Bird_feeding" title="Bird feeding">Bird feeding</a></li> <li><a href="/wiki/Bird_conservation" title="Bird conservation">Conservation</a></li> <li><a href="/wiki/Aviculture" title="Aviculture">Aviculture</a></li> <li><a href="/wiki/Waterfowl_hunting" title="Waterfowl hunting">Waterfowl hunting</a></li> <li><a href="/wiki/Cockfight" class="mw-redirect" title="Cockfight">Cockfighting</a></li> <li><a href="/wiki/Pigeon_racing" title="Pigeon racing">Pigeon racing</a></li> <li><a href="/wiki/Falconry" title="Falconry">Falconry</a></li> <li><a href="/wiki/Pheasantry" title="Pheasantry">Pheasantry</a></li> <li><a href="/wiki/Imping" title="Imping">Imping</a></li> <li><a href="/wiki/Oology" title="Oology">Egg collecting</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Lists</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/List_of_birds" title="List of birds">Families and orders</a></li> <li><a href="/wiki/List_of_bird_genera" title="List of bird genera">Genera</a></li> <li><a href="/wiki/Glossary_of_bird_terms" title="Glossary of bird terms">Glossary of bird terms</a></li> <li><a href="/wiki/List_of_birds_by_population" title="List of birds by population">List by population</a></li> <li><a href="/wiki/Lists_of_birds_by_region" title="Lists of birds by region">Lists by region</a></li> <li><a href="/wiki/List_of_extinct_bird_species_since_1500" title="List of extinct bird species since 1500">Extinct species since 1500</a></li> <li><a href="/wiki/List_of_Late_Quaternary_prehistoric_bird_species" title="List of Late Quaternary prehistoric bird species">Late Quaternary prehistoric birds</a></li> <li>Notable birds <ul><li><a href="/wiki/List_of_individual_birds" title="List of individual birds">individuals</a></li> <li><a href="/wiki/List_of_fictional_birds" title="List of fictional birds">fictional</a></li></ul></li></ul> </div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><div id="Neornithes10" style="font-size:114%;margin:0 4em">Neornithes</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Palaeognathae421" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Palaeognathae" title="Palaeognathae">Palaeognathae</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Struthionidae" title="Struthionidae">Struthioniformes <span style="font-size: 85%;">(ostriches)</span></a></li> <li><a href="/wiki/Rheidae" title="Rheidae">Rheiformes <span style="font-size: 85%;">(rheas)</span></a></li> <li><a href="/wiki/Tinamou" title="Tinamou">Tinamiformes <span style="font-size: 85%;">(tinamous)</span></a></li> <li><a href="/wiki/Kiwi_(bird)" title="Kiwi (bird)">Apterygiformes <span style="font-size: 85%;">(kiwis)</span></a></li> <li><a href="/wiki/Casuariiformes" title="Casuariiformes">Casuariiformes <span style="font-size: 85%;">(emus and cassowaries)</span></a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><span style="margin:-2.5em;display: inline-block; transform: rotate(-90deg);"><a href="/wiki/Neognathae" title="Neognathae">Neognathae</a></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Galloanserae(fowls)1694" scope="row" class="navbox-group" style="width:1%"><span style="margin:0 -2.5em 0 -3em;display: inline-block; transform: rotate(-90deg);"><a href="/wiki/Galloanserae" class="mw-redirect" title="Galloanserae">Galloanserae</a></span><span style="margin: -1em;display: inline-block; transform: rotate(-90deg);"><span style="font-size: 85%;">(<a href="/wiki/Fowl" title="Fowl">fowls</a>)</span></span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anseriformes" title="Anseriformes">Anseriformes</a> <br /> <span style="font-size: 85%;">(waterfowls)</span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anatidae" title="Anatidae">Anatidae</a> <br /> <span style="font-size: 85%;">(<a href="/wiki/Duck" title="Duck">ducks</a>)</span></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Anatinae" title="Anatinae">Anatinae</a> <ul><li><a href="/wiki/Diving_duck" title="Diving duck">Aythyini</a></li> <li><a href="/wiki/Mergini" title="Mergini">Mergini</a></li> <li><a href="/wiki/Oxyurini" title="Oxyurini">Oxyurini</a></li></ul></li> <li><a href="/wiki/Anserinae" title="Anserinae">Anserinae</a> <ul><li><a href="/wiki/Swan" title="Swan"><span style="font-size: 85%;">swans</span></a></li> <li><a href="/wiki/Goose" title="Goose"><span style="font-size: 85%;">true geese</span></a></li></ul></li> <li><a href="/wiki/Whistling_duck" title="Whistling duck">Dendrocygninae</a></li> <li><a href="/wiki/Freckled_duck" title="Freckled duck">Stictonettinae</a></li> <li><a href="/wiki/Tadorninae" title="Tadorninae">Tadorninae</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anhimidae" class="mw-redirect" title="Anhimidae">Anhimidae</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Horned_screamer" title="Horned screamer">Anhima</a></i></li> <li><i><a href="/wiki/Chauna" title="Chauna">Chauna</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Anseranatidae" title="Anseranatidae">Anseranatidae</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Magpie_goose" title="Magpie goose">Anseranas</a></i></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Galliformes" title="Galliformes">Galliformes</a> <br /> <span style="font-size: 85%;">(<a href="/wiki/Landfowl" class="mw-redirect" title="Landfowl">landfowls</a>-</span> <br /> <span style="font-size: 85%;"><a href="/wiki/Gamebirds" class="mw-redirect" title="Gamebirds">gamebirds</a>)</span></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Cracidae" title="Cracidae">Cracidae</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cracinae" class="mw-redirect" title="Cracinae">Cracinae</a></li> <li><a href="/wiki/Oreophasinae" class="mw-redirect" title="Oreophasinae">Oreophasinae</a></li> <li><a href="/wiki/Penelopinae" class="mw-redirect" title="Penelopinae">Penelopinae</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Megapodidae" class="mw-redirect" title="Megapodidae">Megapodidae</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Aepypodius" title="Aepypodius">Aepypodius</a></i></li> <li><i><a href="/wiki/Alectura" class="mw-redirect" title="Alectura">Alectura</a></i></li> <li><i><a href="/wiki/Eulipoa" class="mw-redirect" title="Eulipoa">Eulipoa</a></i></li> <li><i><a href="/wiki/Leipoa" class="mw-redirect" title="Leipoa">Leipoa</a></i></li> <li><i><a href="/wiki/Macrocephalon" class="mw-redirect" title="Macrocephalon">Macrocephalon</a></i></li> <li><i><a href="/wiki/Megapodius" class="mw-redirect" title="Megapodius">Megapodius</a></i></li> <li><i><a href="/wiki/Talegalla" title="Talegalla">Talegalla</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Numididae" class="mw-redirect" title="Numididae">Numididae</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Vulturine_guineafowl" title="Vulturine guineafowl">Acryllium</a></i></li> <li><i><a href="/wiki/Agelastes" title="Agelastes">Agelastes</a></i></li> <li><i><a href="/wiki/Guttera" title="Guttera">Guttera</a></i></li> <li><i><a href="/wiki/Numida" class="mw-redirect" title="Numida">Numida</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Odontophoridae" class="mw-redirect" title="Odontophoridae">Odontophoridae</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/Callipepla" title="Callipepla">Callipepla</a></i></li> <li><i><a href="/wiki/Colinus" title="Colinus">Colinus</a></i></li> <li><i><a href="/wiki/Cyrtonyx" title="Cyrtonyx">Cyrtonyx</a></i></li> <li><i><a href="/wiki/Dactylortyx" class="mw-redirect" title="Dactylortyx">Dactylortyx</a></i></li> <li><i><a href="/wiki/Dendrortyx" title="Dendrortyx">Dendrortyx</a></i></li> <li><i><a href="/wiki/Odontophorus" class="mw-redirect" title="Odontophorus">Odontophorus</a></i></li> <li><i><a href="/wiki/Oreortyx" class="mw-redirect" title="Oreortyx">Oreortyx</a></i></li> <li><i><a href="/wiki/Philortyx" class="mw-redirect" title="Philortyx">Philortyx</a></i></li> <li><i><a href="/wiki/Rhynchortyx" class="mw-redirect" title="Rhynchortyx">Rhynchortyx</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Phasianidae" title="Phasianidae">Phasianidae</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Meleagridinae" class="mw-redirect" title="Meleagridinae">Meleagridinae <span style="font-size: 85%;">(turkeys)</span></a></li> <li><a href="/wiki/Perdicinae" title="Perdicinae">Perdicinae</a></li> <li><a href="/wiki/Phasianinae" title="Phasianinae">Phasianinae <span style="font-size: 85%;">(pheasants and relatives)</span></a></li> <li><a href="/wiki/Grouse" title="Grouse">Tetraoninae</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Neoaves" title="Neoaves">Neoaves</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Columbea" title="Columbea">Columbea</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Columbimorphae" title="Columbimorphae">Columbimorphae</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Columbidae" title="Columbidae">Columbiformes <span style="font-size: 85%;">(doves and pigeons)</span></a></li> <li><a href="/wiki/Mesite" title="Mesite">Mesitornithiformes <span style="font-size: 85%;">(mesites)</span></a></li> <li><a href="/wiki/Sandgrouse" title="Sandgrouse">Pterocliformes <span style="font-size: 85%;">(sandgrouse)</span></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Mirandornithes" title="Mirandornithes">Mirandornithes</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Flamingo" title="Flamingo">Phoenicopteriformes <span style="font-size: 85%;">(flamingos)</span></a></li> <li><a href="/wiki/Grebe" title="Grebe">Podicipediformes <span style="font-size: 85%;">(grebes)</span></a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Passerea" title="Passerea">Passerea</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Otidimorphae" title="Otidimorphae">Otidimorphae</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cuckoo" title="Cuckoo">Cuculiformes <span style="font-size: 85%;">(cuckoos)</span></a></li> <li><a href="/wiki/Turaco" title="Turaco">Musophagiformes <span style="font-size: 85%;">(turacos)</span></a></li> <li><a href="/wiki/Bustard" title="Bustard">Otidiformes <span style="font-size: 85%;">(bustards)</span></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Strisores" title="Strisores">Strisores</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Caprimulgiformes" class="mw-redirect" title="Caprimulgiformes">Caprimulgiformes <span style="font-size: 85%;">(nightjars and relatives)</span></a></li> <li><a href="/wiki/Steatornithiformes" class="mw-redirect" title="Steatornithiformes">Steatornithiformes <span style="font-size: 85%;">(oilbirds)</span></a></li> <li><a href="/wiki/Nyctibiiformes" class="mw-redirect" title="Nyctibiiformes">Nyctibiiformes <span style="font-size: 85%;">(potoos)</span></a></li> <li><a href="/wiki/Podargiformes" class="mw-redirect" title="Podargiformes">Podargiformes <span style="font-size: 85%;">(frogmouths)</span></a></li> <li><a href="/wiki/Aegotheliformes" class="mw-redirect" title="Aegotheliformes">Aegotheliformes <span style="font-size: 85%;">(owlet-nightjars)</span></a></li> <li><a href="/wiki/Apodiformes" title="Apodiformes">Apodiformes <span style="font-size: 85%;">(swifts and hummingbirds)</span></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Opisthocomiformes" class="mw-redirect" title="Opisthocomiformes">Opisthocomiformes</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Opisthocomidae" title="Opisthocomidae">Opisthocomiformes <span style="font-size: 85%;">(hoatzins)</span></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Cursorimorphae" class="mw-redirect" title="Cursorimorphae">Cursorimorphae</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Charadriiformes" title="Charadriiformes">Charadriiformes <span style="font-size: 85%;">(gulls and relatives)</span></a></li> <li><a href="/wiki/Gruiformes" title="Gruiformes">Gruiformes <span style="font-size: 85%;">(cranes and relatives)</span></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Phaethontimorphae" class="mw-redirect" title="Phaethontimorphae">Phaethontimorphae</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Tropicbird" title="Tropicbird">Phaethontiformes <span style="font-size: 85%;">(tropicbirds)</span></a></li> <li><a href="/wiki/Eurypygiformes" title="Eurypygiformes">Eurypygiformes <span style="font-size: 85%;">(kagus and sunbitterns)</span></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Aequornithes" title="Aequornithes">Aequornithes</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Loon" title="Loon">Gaviiformes <span style="font-size: 85%;">(loons or divers)</span></a></li> <li><a href="/wiki/Penguin" title="Penguin">Sphenisciformes <span style="font-size: 85%;">(penguins)</span></a></li> <li><a href="/wiki/Procellariiformes" title="Procellariiformes">Procellariiformes <span style="font-size: 85%;">(albatrosses and petrels)</span></a></li> <li><a href="/wiki/Stork" title="Stork">Ciconiiformes <span style="font-size: 85%;">(storks)</span></a></li> <li><a href="/wiki/Suliformes" title="Suliformes">Suliformes <span style="font-size: 85%;">(cormorants and relatives)</span></a></li> <li><a href="/wiki/Pelecaniformes" title="Pelecaniformes">Pelecaniformes <span style="font-size: 85%;">(pelicans and relatives)</span></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Australaves" title="Australaves">Australaves</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cariamiformes" title="Cariamiformes">Cariamiformes <span style="font-size: 85%;">(seriemas and relatives)</span></a></li> <li><a href="/wiki/Falconiformes" title="Falconiformes">Falconiformes <span style="font-size: 85%;">(falcons and relatives)</span></a></li> <li><a href="/wiki/Parrot" title="Parrot">Psittaciformes <span style="font-size: 85%;">(parrots)</span></a></li> <li><a href="/wiki/Passerine" title="Passerine">Passeriformes <span style="font-size: 85%;">(perching birds)</span></a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Afroaves" title="Afroaves">Afroaves</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Accipitriformes" title="Accipitriformes">Accipitriformes <span style="font-size: 85%;">(raptors)</span></a></li> <li><a href="/wiki/Owl" title="Owl">Strigiformes <span style="font-size: 85%;">(owls)</span></a></li> <li><a href="/wiki/Mousebird" title="Mousebird">Coliiformes <span style="font-size: 85%;">(mousebirds)</span></a></li> <li><a href="/wiki/Trogon" title="Trogon">Trogoniformes <span style="font-size: 85%;">(trogons and quetzals)</span></a></li> <li><a href="/wiki/Cuckoo-roller" title="Cuckoo-roller">Leptosomiformes <span style="font-size: 85%;">(cuckoo-rollers)</span></a></li> <li><a href="/wiki/Bucerotiformes" title="Bucerotiformes">Bucerotiformes <span style="font-size: 85%;">(hornbills and hoopoes)</span></a></li> <li><a href="/wiki/Coraciiformes" title="Coraciiformes">Coraciiformes <span style="font-size: 85%;">(kingfishers and rollers)</span></a></li> <li><a href="/wiki/Piciformes" title="Piciformes">Piciformes <span style="font-size: 85%;">(woodpeckers and relatives)</span></a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="2"><div> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, 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data-event-name="ve-edit-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-edit mw-ui-icon-wikimedia-wikimedia-edit"></span> <span></span> </a> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only" id="ca-viewsource-sticky-header" tabindex="-1" data-event-name="ve-edit-protected-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-editLock mw-ui-icon-wikimedia-wikimedia-editLock"></span> <span></span> </a> </div> <div class="vector-sticky-header-buttons"> <button class="cdx-button cdx-button--weight-quiet mw-interlanguage-selector" id="p-lang-btn-sticky-header" tabindex="-1" data-event-name="ui.dropdown-p-lang-btn-sticky-header"><span class="vector-icon mw-ui-icon-wikimedia-language mw-ui-icon-wikimedia-wikimedia-language"></span> <span>143 languages</span> </button> <a href="#" class="cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive" id="ca-addsection-sticky-header" tabindex="-1" data-event-name="addsection-sticky-header"><span class="vector-icon mw-ui-icon-speechBubbleAdd-progressive mw-ui-icon-wikimedia-speechBubbleAdd-progressive"></span> <span>Add topic</span> </a> </div> <div class="vector-sticky-header-icon-end"> <div class="vector-user-links"> </div> </div> </div> </div> </div> <div class="mw-portlet mw-portlet-dock-bottom emptyPortlet" id="p-dock-bottom"> <ul> </ul> </div> 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