{"id":492811,"date":"2022-09-14T02:00:01","date_gmt":"2022-09-13T23:00:01","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/cowbird-chicks-do-best-with-two-warbler-nest-mates-not-four-not-zero-study-finds\/"},"modified":"2022-09-14T02:00:01","modified_gmt":"2022-09-13T23:00:01","slug":"cowbird-chicks-do-best-with-two-warbler-nest-mates-not-four-not-zero-study-finds","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/cowbird-chicks-do-best-with-two-warbler-nest-mates-not-four-not-zero-study-finds\/","title":{"rendered":"#Cowbird chicks do best with two warbler nest mates\u2014not four, not zero, study finds"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a373212a6373\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #dd3333;color:#dd3333\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #dd3333;color:#dd3333\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a373212a6373\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/buradabiliyorum.com\/en\/cowbird-chicks-do-best-with-two-warbler-nest-mates-not-four-not-zero-study-finds\/#%E2%80%9CCowbird_chicks_do_best_with_two_warbler_nest_mates%E2%80%94not_four_not_zero_study_finds%E2%80%9D\" >&#8220;Cowbird chicks do best with two warbler nest mates\u2014not four, not zero, study finds&#8221;<\/a><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E2%80%9CCowbird_chicks_do_best_with_two_warbler_nest_mates%E2%80%94not_four_not_zero_study_finds%E2%80%9D\"><\/span>&#8220;Cowbird chicks do best with two warbler nest mates\u2014not four, not zero, study finds&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2022\/cowbird-chicks-do-best.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/cowbird-chicks-do-best.jpg\" data-sub-html=\"A cowbird nestling peers out from a warbler nest. Credit: Nicholas Antonson\">\n<figure class=\"article-img\">\n            <img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800a\/2022\/cowbird-chicks-do-best.jpg\" alt=\"Cowbird chicks do best with two warbler nest mates \u2013 not four, not zero, study finds\" title=\"A cowbird nestling peers out from a warbler nest. Credit: Nicholas Antonson\" width=\"800\" height=\"530\"\/><figcaption class=\"text-darken text-low-up text-truncate-js text-truncate mt-3\">\n                A cowbird nestling peers out from a warbler nest. Credit: Nicholas Antonson<br \/>\n            <\/figcaption><\/figure>\n<\/p><\/div>\n<\/div>\n<p>Brown-headed cowbirds are <a href=\"https:\/\/buradabiliyorum.com\/en\/category\/general\/\" data-internallinksmanager029f6b8e52c=\"3\" title=\"General\" target=\"_blank\" rel=\"noopener\">general<\/a>ist brood parasites, laying their eggs in the nests of many other bird species and letting the host parents raise their young. A new study seeks to understand the strategies cowbird chicks use to survive in prothonotary warbler nests when they hatch with different numbers of warbler nestlings. The study reveals that a cowbird chick does better with two than with four or zero warbler nest mates.<\/p>\n<section class=\"article-banner first-banner ads-336x280\">\n         <!-- \/4988204\/Phys_Story_InText_Box --><\/p>\n<\/section>\n<p>The researchers report their findings in the <i>Proceedings of the Royal Society B: Biological <a href=\"https:\/\/buradabiliyorum.com\/en\/category\/sciencee\/\" data-internallinksmanager029f6b8e52c=\"5\" title=\"Science\" target=\"_blank\" rel=\"noopener\">Science<\/a>s<\/i>.<\/p>\n<p>If a cowbird ends up in a prothonotary warbler nest with four host chicks, the cowbird either perishes or the number of warbler chicks drops, usually to two, the study found. This suggests that cowbirds engage in what the naturalist Charles Darwin called &#8220;niche construction,&#8221; modifying their environment to enhance their own survival, the researchers said.<\/p>\n<p>&#8220;Brood parasites like brown-headed cowbirds lay their eggs in the nests of so many different species, we wanted to know about one really important aspect of how they make a go of it in a world that, when they hatch, could be any one of 200 different scenarios,&#8221; said Nicholas Antonson, a Ph.D. candidate at the University of Illinois Urbana-Champaign who led the study with Mark Hauber, a U. of I. professor of evolution, ecology and behavior. &#8220;We focused on what h<a href=\"https:\/\/buradabiliyorum.com\/en\/category\/download-scripts-themes-apps\/\" data-internallinksmanager029f6b8e52c=\"9\" title=\"Download Scripts &amp; Themes &amp; Apps\" target=\"_blank\" rel=\"noopener\">app<\/a>ens when a cowbird hatches into a nest with different numbers of host nestlings.&#8221;<\/p>\n<p>Cowbird chicks never eject eggs from host nests or directly kill host young. This differentiates them from another brood parasite, the common cuckoo, which will kill all other chicks in the nest and claim all the food the foster parents can provide, Antonson said. A <a rel=\"nofollow noopener\" target=\"_blank\" href=\"https:\/\/www.science.org\/doi\/10.1126\/science.1098487\">previous study from <i>Science<\/i><\/a> showed that this strategy does not work for cowbirds in the nests of another host bird: the Eastern phoebe. In that study, cowbirds actually got less food from host parents when there were no nest mates than when there were two host chicks.<\/p>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2022\/cowbird-chicks-do-best-1.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/cowbird-chicks-do-best-1.jpg\" data-sub-html=\"A new study tested the interactions between brown-headed cowbirds, which are nest parasites, and prothonotary warblers, one of their hosts. University of Illinois Urbana-Champaign Ph.D. candidate Nicholas Antonson prepares a nest box to accommodate a prothonotary warbler nest. Credit: Nicholas Antonson\">\n<figure class=\"article-img text-center\">\n            <img decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800a\/2022\/cowbird-chicks-do-best-1.jpg\" alt=\"Cowbird chicks do best with two warbler nest mates \u2013 not four, not zero, study finds\" title=\"A new study tested the interactions between brown-headed cowbirds, which are nest parasites, and prothonotary warblers, one of their hosts. University of Illinois Urbana-Champaign Ph.D. candidate Nicholas Antonson prepares a nest box to accommodate a prothonotary warbler nest. Credit: Nicholas Antonson\"\/><figcaption class=\"text-left text-darken text-truncate text-low-up mt-3\">\n                A new study tested the interactions between brown-headed cowbirds, which are nest parasites, and prothonotary warblers, one of their hosts. University of Illinois Urbana-Champaign Ph.D. candidate Nicholas Antonson prepares a nest box to accommodate a prothonotary warbler nest. Credit: Nicholas Antonson<br \/>\n            <\/figcaption><\/figure>\n<\/p><\/div>\n<\/div>\n<p>&#8220;Cowbirds have adapted to live with host nest mates,&#8221; Hauber said. &#8220;They outcompete them, they raise their heads higher, and they beg more loudly and for longer periods of time, but they do not actively displace the host nest mates.&#8221;<\/p>\n<p>To better understand these dynamics, the team deployed nest boxes that were attractive to warblers and cowbirds in a southern Illinois swamp forest. The boxes were designed to exclude ground predators like snakes and raccoons, and aerial predation by hawks and owls. By changing out the bedding in the boxes four days after the eggs hatched, the team also reduced the threat from invertebrate parasites like blowflies.<\/p>\n<p>The team followed nests with and without cowbird parasites and manipulated the number of host chicks in the nests by moving warbler eggs or chicks between nests. All the nests parasitized by cowbirds had either zero, two or four warbler nest mates. Control nests containing only warbler chicks were matched for the total number of young.<\/p>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2022\/cowbird-chicks-do-best-2.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/cowbird-chicks-do-best-2.jpg\" data-sub-html=\"A bird\u2019s eye view from the nest box of researcher Nicholas Antonson. Credit: Fred Zwicky\">\n<figure class=\"article-img text-center\">\n            <img decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800a\/2022\/cowbird-chicks-do-best-2.jpg\" alt=\"Cowbird chicks do best with two warbler nest mates \u2013 not four, not zero, study finds\" title=\"A bird\u2019s eye view from the nest box of researcher Nicholas Antonson. Credit: Fred Zwicky\"\/><figcaption class=\"text-left text-darken text-truncate text-low-up mt-3\">\n                A bird\u2019s eye view from the nest box of researcher Nicholas Antonson. Credit: Fred Zwicky<br \/>\n            <\/figcaption><\/figure>\n<\/p><\/div>\n<\/div>\n<p>Previous studies had quantified the amount of food the host parents brought into the nest and what proportion of the food the cowbird nestling received. In general, cowbirds hatch earlier than their nest mates. They tend to be bigger and more aggressive than warbler chicks and extract more than their fair share of food from the host parents, Antonson said. Cowbirds need more food because they grow two to three times larger in the nest than the warbler chicks.<\/p>\n<p>&#8220;One of the unique aspects of our study is that we also quantified how many cowbirds survived to fledging in each of these different scenarios,&#8221; Antonson said. &#8220;We found that cowbirds survive best in the nests where they hatch with two host nestlings. That&#8217;s better than when they hatch with four host nestlings or with zero host nestlings. Cowbirds raised with more than that optimal number of two host nestlings appear to reduce the host brood sizes down to two.&#8221;<\/p>\n<ul class=\"article-gallery js-article-gallery\">\n<li data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2022\/cowbird-chicks-do-best-3.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/cowbird-chicks-do-best-3.jpg\" data-sub-html=\"Brown-headed cowbirds lay their eggs in the nests of other bird species, forcing the host parents to raise their young alongside the hosts\u2019 own offspring. Here, a cowbird egg, lower right, sits in a nest with five prothonotary warbler eggs. Credit: Nicholas Antonson\">\n<figure class=\"article-img text-center\">\n                <img decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800\/2022\/cowbird-chicks-do-best-3.jpg\" alt=\"Cowbird chicks do best with two warbler nest mates \u2013 not four, not zero, study finds\"\/><figcaption class=\"text-left text-darken text-low-up text-truncate mt-3\">\n                    Brown-headed cowbirds lay their eggs in the nests of other bird species, forcing the host parents to raise their young alongside the hosts\u2019 own offspring. Here, a cowbird egg, lower right, sits in a nest with five prothonotary warbler eggs. Credit: Nicholas Antonson<br \/>\n                <\/figcaption><\/figure>\n<\/li>\n<li data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2022\/cowbird-chicks-do-best-4.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/hires\/2022\/cowbird-chicks-do-best-4.jpg\" data-sub-html=\"The prothonotary warbler adult tends to its nestlings in a nest box made from a milk carton. Credit: Nicholas Antonson\">\n<figure class=\"article-img text-center\">\n                <img decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800\/2022\/cowbird-chicks-do-best-4.jpg\" alt=\"Cowbird chicks do best with two warbler nest mates \u2013 not four, not zero, study finds\"\/><figcaption class=\"text-left text-darken text-low-up text-truncate mt-3\">\n                    The prothonotary warbler adult tends to its nestlings in a nest box made from a milk carton. Credit: Nicholas Antonson<br \/>\n                <\/figcaption><\/figure>\n<\/li>\n<li data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2022\/cowbird-chicks-do-best-5.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/cowbird-chicks-do-best-5.jpg\" data-sub-html=\"The site of the study, a forested wetland in the Cache River watershed of southern Illinois. Credit: Nicholas Antonson\">\n<figure class=\"article-img text-center\">\n                <img decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800\/2022\/cowbird-chicks-do-best-5.jpg\" alt=\"Cowbird chicks do best with two warbler nest mates \u2013 not four, not zero, study finds\"\/><figcaption class=\"text-left text-darken text-low-up text-truncate mt-3\">\n                    The site of the study, a forested wetland in the Cache River watershed of southern Illinois. Credit: Nicholas Antonson<br \/>\n                <\/figcaption><\/figure>\n<\/li>\n<li data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2022\/cowbird-chicks-do-best-6.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/cowbird-chicks-do-best-6.jpg\" data-sub-html=\"Cowbirds tend to be larger than the host nestlings. They open their mouths wider and hold their heads higher than other birds, allowing them to consume more of the food brought to the nest by the host parents. Credit: Nicholas Antonson\">\n<figure class=\"article-img text-center\">\n                <img decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800\/2022\/cowbird-chicks-do-best-6.jpg\" alt=\"Cowbird chicks do best with two warbler nest mates \u2013 not four, not zero, study finds\"\/><figcaption class=\"text-left text-darken text-low-up text-truncate mt-3\">\n                    Cowbirds tend to be larger than the host nestlings. They open their mouths wider and hold their heads higher than other birds, allowing them to consume more of the food brought to the nest by the host parents. Credit: Nicholas Antonson<br \/>\n                <\/figcaption><\/figure>\n<\/li>\n<\/ul>\n<p>The reduction seen in host nestling numbers when cowbirds are present doesn&#8217;t occur in the control warbler nests with no cowbird nestlings, the researchers found.<\/p>\n<p>&#8220;We think that the cowbirds are manipulating the host numbers to reduce them to the optimal so that they can grow best,&#8221; Hauber said. Stealing food meant for the other nestlings is the likely means by which they do that. Further studies will be needed to confirm that hypothesis.<\/p>\n<hr\/>\n<div class=\"article-main__explore my-4 d-print-none\">\n<p>                                            Cowbirds change their eggs&#8217; sex ratio based on breeding time\n                                        <\/p><\/div>\n<hr class=\"mb-4\"\/>\n<div class=\"article-main__more p-4\">\n                                                                                                <strong>More information:<\/strong><br \/>\n                                                Mark Hauber et al, Niche construction through a Goldilocks principle maximizes fitness for a nest-sharing brood parasite, <i>Proceedings of the Royal Society B: Biological Sciences<\/i> (2022). <a rel=\"nofollow noopener\" target=\"_blank\" href=\"http:\/\/rspb.royalsocietypublishing.org\/lookup\/doi\/10.1098\/rspb.2022.1223\">rspb.royalsocietypublishing.or \u2026 .1098\/rspb.2022.1223<\/a><\/p><\/div>\n<div class=\"d-inline-block text-medium my-4\">\n                                                Provided by<br \/>\n                                                                                                    University of Illinois at Urbana-Champaign<br \/>\n                                                                                                        <a rel=\"nofollow noopener\" target=\"_blank\" class=\"icon_open\" href=\"http:\/\/illinois.edu\/\"><br \/>\n                                                        <svg>\n                                                            <use href=\"https:\/\/phys.b-cdn.net\/tmpl\/v6\/img\/svg\/sprite.svg#icon_open\" x=\"0\" y=\"0\"\/>\n                                                        <\/svg><br \/>\n                                                    <\/a><\/p><\/div>\n<p>                                        <!-- print only --><\/p>\n<div class=\"d-none d-print-block\">\n<p>                                                 <strong>Citation<\/strong>:<br \/>\n                                                 Cowbird chicks do best with two warbler nest mates\u2014not four, not zero, study finds (2022, September 13)<br \/>\n                                                 retrieved 13 September 2022<br \/>\n                                                 from https:\/\/phys.org\/<a href=\"https:\/\/buradabiliyorum.com\/en\/category\/news\/\" data-internallinksmanager029f6b8e52c=\"2\" title=\"News\" target=\"_blank\" rel=\"noopener\">news<\/a>\/2022-09-cowbird-chicks-warbler-matesnot.html<\/p>\n<p>                                            This document is subject to copyright. Apart from any fair dealing for the purpose of private study or research, no<br \/>\n                                            part may be reproduced without the written permission. The content is provided for information purposes only.<\/p><\/div>\n<\/p><\/div>\n<p><script id=\"facebook-jssdk\" async=\"\" src=\"https:\/\/connect.facebook.net\/en_US\/sdk.js\"><\/script><\/p>\n<blockquote><p><strong><span style=\"color: #ff6600;\">If you liked the article, do not forget to share it with your friends. Follow us on\u00a0<span style=\"color: #ff0000;\"><a style=\"color: #ff0000;\" href=\"https:\/\/news.google.com\/publications\/CAAqBwgKMLG0nwswvr63Aw\" target=\"_blank\" rel=\"nofollow noopener noreferrer\">Google News<\/a><\/span>\u00a0too, click on the star and choose us from your favorites.<\/span><\/strong><\/p><\/blockquote>\n<blockquote>\n<p style=\"text-align: center;\">For forums sites go to <span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/forum.buradabiliyorum.com\/\" target=\"_blank\" rel=\"noopener\">Forum.BuradaBiliyorum.Com<\/a><\/span><\/strong>\n<\/p><\/blockquote>\n<blockquote>\n<p style=\"text-align: center;\"><strong>If you want to read more Like this articles, you can visit our <span style=\"color: #ff9900;\"><a style=\"color: #ff9900;\" href=\"https:\/\/en.buradabiliyorum.com\/science\/\" target=\"_blank\" rel=\"noopener\">Science category.<\/a><\/span><\/strong><\/p>\n<\/blockquote>\n<p><span style=\"color: black;\"><a style=\"color: #ff9900;\" href=\"https:\/\/phys.org\/news\/2022-09-cowbird-chicks-warbler-matesnot.html\" target=\"_blank\" rel=\"noopener\">Source<\/a><\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8220;Cowbird chicks do best with two warbler nest mates\u2014not four, not zero, study finds&#8221; A cowbird nestling peers out from a warbler nest. Credit: Nicholas Antonson Brown-headed cowbirds are generalist brood parasites, laying their eggs in the nests of many other bird species and letting the host parents raise their young. A new study seeks&#8230;<\/p>\n","protected":false},"author":1,"featured_media":492812,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/scx2.b-cdn.net\/gfx\/news\/2022\/cowbird-chicks-do-best.jpg","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[],"class_list":["post-492811","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sciencee"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/492811","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=492811"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/492811\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media\/492812"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=492811"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=492811"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=492811"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}