{"id":37134,"date":"2026-09-27T10:14:00","date_gmt":"2026-09-27T14:14:00","guid":{"rendered":"https:\/\/www.ecoticias.com\/en\/?p=37134"},"modified":"2026-09-22T09:55:53","modified_gmt":"2026-09-22T13:55:53","slug":"flamingo-chicks-crop-milk-national-zoo","status":"publish","type":"post","link":"https:\/\/www.ecoticias.com\/en\/flamingo-chicks-crop-milk-national-zoo\/37134\/","title":{"rendered":"Nine flamingo chicks at the Smithsonian\u2019s National Zoo are revealing one of bird parenting\u2019s strangest sacrifices: both mothers and fathers produce nutrient-rich red \u201ccrop milk\u201d that can drain so much pigment from their bodies that the famously pink adults temporarily fade to nearly white"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Nine fluffy chicks are offering a behind-the-scenes look at one of flamingo parenting\u2019s strangest trade-offs. At the Smithsonian\u2019s National Zoo, feeding babies means producing red \u201ccrop milk,\u201d a process that can leave the adults much paler.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The zoo\u2019s July 17, 2026, account reported 66 <a href=\"https:\/\/nationalzoo.si.edu\/animals\/american-flamingo\" target=\"_blank\" rel=\"noopener\">American flamingos<\/a>, including nine chicks hatched in 2026. Bird House curator Sara Hallager describes a nursery supported by careful egg management, shared parenting and regular health checks, not simply a flock left to figure things out.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Why pink parents can turn almost white<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A flamingo\u2019s color starts with its food. Natural pigments called <a href=\"https:\/\/www.ecoticias.com\/en\/nasa-observes-argentina-from-the-international-space-station-and-detects-a-gigantic-pink-heart-nearly-10-kilometers-wide-whose-color-does-not-have-as-romantic-an-origin-as-it-seems\/31086\/\">carotenoids<\/a>, found in algae and passed along through animals such as brine shrimp, help give its feathers their familiar pink appearance.<\/p>\n\n\n\n<div class=\"gb-element-a00da4e5\">\n<div><div class=\"gb-looper-46613eed\">\n<div class=\"gb-loop-item gb-loop-item-a8390598 post-36326 post type-post status-publish format-standard has-post-thumbnail hentry category-environment resize-featured-image\">\n<h4 class=\"gb-text gb-text-24a51617\">Read More: <a href=\"https:\/\/www.ecoticias.com\/en\/a-whale-as-long-as-a-city-bus-can-race-through-the-ocean-but-noaas-212-strandings-reveal-a-hidden-coastal-danger\/36326\/\">A whale as long as a city bus can race through the ocean, but NOAA\u2019s 212 strandings reveal a hidden coastal danger<\/a><\/h4>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Those pigments also enter the nutrient-rich secretion parents feed their chicks. Producing that food can leave both mothers and fathers pale pink or nearly white by the end of the nesting period.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This color change is not automatically a sign of poor health. San Diego Zoo and the <a href=\"https:\/\/www.wwt.org.uk\/wetland-centres\/slimbridge\/flamingo-diary\/flamingo-dads-are-flamtastic\" target=\"_blank\" rel=\"noopener\">Wildfowl and Wetlands Trust<\/a> describe parents regaining their pink appearance as chicks become independent and new feathers grow. Still, appearance alone cannot tell keepers whether a bird is thriving.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Baby flamingos need more than shrimp<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Despite its name, crop milk is not dairy, and it does not come from mammary glands. It is a secretion from the <a href=\"https:\/\/sandiegozoowildlifealliance.org\/story-hub\/zoonooz\/growing-up-flamingo\" target=\"_blank\" rel=\"noopener\">upper digestive tract<\/a>, rich in fat and protein, that parents deliver directly from bill to bill. Chicks hatch with straight bills and need time to develop the filtering structures adults use to collect food from water.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Why might a chick look as though it is bleeding? Red crop milk can splash onto its gray feathers during feeding, a sight Hallager says sometimes alarms visitors. A fuller crop, the food-storage pouch near the base of the throat, also helps keepers spot which youngsters have eaten.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The egg swap that gives chicks a safer start<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Long before the first feeding, keepers face a more delicate problem. Flamingos usually lay a single egg on a mud nest, but an accident can destroy it before a chick ever emerges.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u201cParents have a habit of accidentally kicking eggs off the nest or forgetting to turn them,\u201d Hallager explained. To reduce those risks, staff replace newly laid eggs with replicas and move the real ones into <a href=\"https:\/\/www.ecoticias.com\/en\/a-belgian-park-has-now-bred-all-three-blue-macaw-species-and-the-two-chicks-that-completed-the-record-needed-twelve-hand-feedings-a-day-to-survive-their-first-week\/35742\/\">incubators<\/a> where temperature and humidity can be controlled.<\/p>\n\n\n\n<div class=\"gb-element-fd434483\">\n<div><div class=\"gb-looper-99ad5e6f\">\n<div class=\"gb-loop-item gb-loop-item-0d6e18a9 post-36324 post type-post status-publish format-standard has-post-thumbnail hentry category-environment resize-featured-image\">\n<h4 class=\"gb-text gb-text-69da5392\">Read More: <a href=\"https:\/\/www.ecoticias.com\/en\/a-hidden-crust-of-insects-can-build-up-on-wind-turbine-blades-during-calm-weather-then-cut-power-production-by-up-to-25-when-stronger-winds-arrive-even-though-the-machinery-itself-may-be-working-per\/36324\/\">A hidden crust of insects can build up on wind-turbine blades during calm weather, then cut power production by up to 25% when stronger winds arrive, even though the machinery itself may be working perfectly<\/a><\/h4>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Meanwhile, the adults continue sitting on their substitute eggs, giving keepers a chance to observe their nest care. As hatching begins, the most attentive pairs are given priority to receive a real egg.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">A noisy nursery with its own babysitters<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">How does a parent find its baby in a crowd of almost identical gray chicks? Each youngster has a <a href=\"https:\/\/www.ecoticias.com\/en\/if-you-hear-birds-singing-around-your-home-during-the-day-it-may-not-be-background-noise-but-a-sign-that-something-healthy-is-happening-around-your-garden\/32179\/\">distinctive call<\/a>, allowing parents to recognize their own offspring even within large gatherings. That matters in the wild, too, where flocks can contain thousands of birds.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Chicks also gather in groups known as \u201ccr\u00e8ches,\u201d where other adults provide supervision while their parents are away. Hallager likens these helpers to \u201caunts and uncles,\u201d a bit like a shared neighborhood nursery. But parents still return to deliver meals to the chicks they are raising, so the arrangement does not remove their feeding responsibilities.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Independence does not end the feeding requests<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">By around three months, the zoo says, chicks can feed themselves and move around confidently. That does not mean their parents are off the hook, since some youngsters continue begging for crop milk and receiving it for more than six months.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Feeding independence and adult appearance are not the same milestone. A chick may be able to collect its own food well before it looks like the bright pink bird visitors expect, since adult coloration takes several years to develop.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">The care behind every successful hatching<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The human side of the nursery involves plenty of recordkeeping. Hallager\u2019s team tracks weight checks, veterinary examinations and vaccinations, including those against West Nile virus, as part of the continuing care that follows each chick\u2019s arrival.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The Bird House team has been helping raise flamingos since 1992. The nine chicks described in the July update are the latest example of parents and keepers doing different parts of the same demanding job.<\/p>\n\n\n\n<div class=\"gb-element-79eb34fc\">\n<div><div class=\"gb-looper-1cbe5b85\">\n<div class=\"gb-loop-item gb-loop-item-00e7ae57 post-36323 post type-post status-publish format-standard has-post-thumbnail hentry category-environment resize-featured-image\">\n<h4 class=\"gb-text gb-text-9e9df51b\">Read More: <a href=\"https:\/\/www.ecoticias.com\/en\/millions-rely-on-ldl-cholesterol-tests-to-judge-heart-risk-but-a-new-study-suggests-apob-may-uncover-dangerous-particles-those-familiar-numbers-can-miss-and-could-help-prevent-more-heart-attacks-and\/36323\/\">Millions rely on LDL cholesterol tests to judge heart risk, but a new study suggests apoB may uncover dangerous particles those familiar numbers can miss and could help prevent more heart attacks and strokes<\/a><\/h4>\n<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Beyond the zoo, American flamingos depend on <a href=\"https:\/\/www.ecoticias.com\/en\/an-ohio-nuclear-plant-left-850-acres-untouched-for-safety-and-a-threatened-spotted-turtle-found-the-wetland-it-needed\/36325\/\">shallow-water habitats<\/a> that can be damaged by mining and human disturbance. Caring for chicks in a managed flock does not replace protecting those places in the wild.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The official account was published on the Smithsonian\u2019s National Zoo and Conservation Biology Institute website.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nine fluffy chicks are offering a behind-the-scenes look at one of flamingo parenting\u2019s strangest trade-offs. At the Smithsonian\u2019s National Zoo, &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Nine flamingo chicks at the Smithsonian\u2019s National Zoo are revealing one of bird parenting\u2019s strangest sacrifices: both mothers and fathers produce nutrient-rich red \u201ccrop milk\u201d that can drain so much pigment from their bodies that the famously pink adults temporarily fade to nearly white\" class=\"read-more button\" href=\"https:\/\/www.ecoticias.com\/en\/flamingo-chicks-crop-milk-national-zoo\/37134\/#more-37134\" aria-label=\"Read more about Nine flamingo chicks at the Smithsonian\u2019s National Zoo are revealing one of bird parenting\u2019s strangest sacrifices: both mothers and fathers produce nutrient-rich red \u201ccrop milk\u201d that can drain so much pigment from their bodies that the famously pink adults temporarily fade to nearly white\">Read more<\/a><\/p>\n","protected":false},"author":19,"featured_media":37133,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-37134","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environment","resize-featured-image"],"_links":{"self":[{"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/posts\/37134","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/users\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/comments?post=37134"}],"version-history":[{"count":2,"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/posts\/37134\/revisions"}],"predecessor-version":[{"id":37205,"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/posts\/37134\/revisions\/37205"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/media\/37133"}],"wp:attachment":[{"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/media?parent=37134"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/categories?post=37134"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ecoticias.com\/en\/wp-json\/wp\/v2\/tags?post=37134"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}