{"publisher":{"name":"MediaBias News","url":"https://mediabias.news","methodology":"https://mediabias.news/methodology","editorialPrinciples":"https://mediabias.news/editorial-principles","corrections":"https://mediabias.news/corrections"},"scoreGuide":{"trust":"How well corroborated and evidenced the source reporting is. 0-100, higher is better.","critic":"Craft quality of the source journalism: context, balance, fact vs comment. 0-100, higher is better.","hype":"How far the source presentation runs ahead of substance. 0-100, LOWER IS BETTER.","scope":"Scores assess the original reporting this article was written from, not the truth of the underlying event and not the quality of this write-up."},"assessmentGuide":{"type":"coverage-and-source-reporting-analysis","factCheck":{"status":"not-performed","note":"Media Bias News compares coverage and scores the source reporting. It does not currently publish a ClaimReview verdict on whether the underlying event or claim is true."},"sourceFactuality":{"note":"Factuality values describe published ratings of the outlets that covered the story. They are not a factuality verdict on this story or its claims."}},"story":{"id":"https://mediabias.news/climate/zavodovski-island-loses-title-of-largest-penguin-colony","slug":"zavodovski-island-loses-title-of-largest-penguin-colony","url":"https://mediabias.news/climate/zavodovski-island-loses-title-of-largest-penguin-colony","title":"Zavodovski Island loses title of largest penguin colony","subtitle":"Chinstrap penguin population has declined by 63% since 2011, scientists report.","excerpt":"Zavodovski Island, once home to the world's largest penguin colony, has lost that title due to a significant decline in chinstrap penguins. Scientists attribute the population drop to human-driven climate change, which is impacting the krill population.","category":"Climate","area":null,"publishedAt":"2026-10-08T18:25:15.162Z","sourceReportedAt":"2026-10-08T14:38:16.702Z","updatedAt":"2026-10-08T18:25:15.162Z","readTime":"4 min read","scores":{"trust":60,"critic":65,"hype":30,"notes":{"trust":"The central claim is attributed to named researchers and a journal, with figures from aerial surveys and satellite data.","critic":"The full report quotes affected parties and explains why the story matters, but lacks a right of reply.","hype":"Headlines are mostly factual, with some mild emphasis on the decline of the penguin colony."}},"tags":["#ClimateChange","#Penguins","#Conservation","#Wildlife","#Antarctica"],"entities":["Zavodovski Island","Chinstrap penguins","Macaroni penguins","British Antarctic Survey","Norman Ratcliffe"],"body":[{"type":"key_takeaways","items":["Zavodovski Island, in the South Sandwich Islands, is no longer home to the world's largest penguin colony.","Chinstrap penguin numbers on the island have fallen by 63% between 2011 and 2025, a loss of over half a million birds.","Scientists attribute the decline to human-driven climate change, which is warming the ocean and disrupting the krill population, the penguins' primary food source.","While chinstrap penguins declined, the island's macaroni penguin population increased by 28% between 2011 and 2016."]},{"type":"paragraph","text":"Zavodovski Island, an uninhabited volcanic outcrop in the Southern Ocean, has lost its status as the location of the world's largest penguin colony. British Antarctic Survey researchers found that chinstrap penguin populations there declined by 63% between 2011 and 2025. This represents a loss of more than half a million penguins from the island."},{"type":"paragraph","text":"Scientists attribute this significant population drop to human-driven climate change. They state that warming oceans are disrupting the krill population, which is the primary food source for chinstrap penguins. The research, published in the journal Current Biology, noted that the chinstrap penguin is a specialist species with a limited range that is being squeezed by environmental changes."},{"type":"paragraph","text":"In contrast to the chinstrap penguins, the macaroni penguin population on Zavodovski Island increased by 28% between 2011 and 2016, after which it remained stable. Researchers suggested this difference supports the climate change theory, as macaroni penguins are more adaptable to warmer waters and have a more varied diet."},{"type":"heading","text":"Divergent population figures"},{"type":"paragraph","text":"Reports provide differing figures for the total number of chinstrap penguins on Zavodovski Island in 2011 and 2025. KIFI, citing British Antarctic Survey findings, states the number of occupied nests fell by 63% between 2011 and 2025. The Independent and The Independent (US) report that the number of breeding chinstrap penguins fell from over a million to 400,000. Newser states chinstrap penguins plunged 63% since 2011, from roughly 1.09 million to 402,000 in 2025. NOS reports that in 2011, 900,000 hooded penguins and 90,000 macaroni penguins lived on Zavodovski Island."},{"type":"heading","text":"What the coverage left out"},{"type":"paragraph","text":"None of the left, centre, or right-rated reports printed below mention the macaroni penguin population increase on Zavodovski Island."}],"basedOn":[{"sourceName":"topky.sk","url":"https://topky.sk/cl/13/9513625/Mrazive-zistenie-v-Antarktide--Z-obrovskej-kolonie-tucniakov-zmizli-dve-tretiny--Co-sa-stalo-","headline":"A Chilling Discovery in Antarctica: Two-Thirds of a Huge Penguin Colony Have Disappeared! What Happened?","angle":"","publishedAt":"2026-10-08T18:00:00.000Z"},{"sourceName":"Mediafax","url":"https://mediafax.ro/externe/cea-mai-mare-colonie-de-pinguini-din-lume-decimata-de-schimbarile-climatice-23822212","headline":"The Largest Penguin Colony in the World, Decimated by Climate Change","angle":"","publishedAt":"2026-10-08T14:38:16.702Z"},{"sourceName":"ecotopical.com","url":"https://ecotopical.com/ehn/461637/inside-collapse-earths-largest-penguin-colony","headline":"Inside the collapse of earth's largest penguin colony","angle":"","publishedAt":"2026-10-08T14:15:00.000Z"},{"sourceName":"L'INDIPENDENTE","url":"https://lindipendente.online/2026/10/08/la-colonia-di-pinguini-piu-grande-al-mondo-e-diminuita-di-due-terzi","headline":"The Largest Penguin Colony in the World Has Decreased by Two Thirds","angle":"","publishedAt":"2026-10-08T14:03:05.000Z"},{"sourceName":"sciencesetavenir.fr","url":"https://sciencesetavenir.fr/nature-environnement/la-plus-grande-colonie-de-manchots-du-monde-victime-du-changement-climatique-montre-une-etude_195269","headline":"The Largest Colony of Penguins in the World Is \"in Danger\", Argues a Study","angle":"","publishedAt":"2026-10-08T13:18:22.000Z"},{"sourceName":"Il Post","url":"https://ilpost.it/2026/10/08/problemi-colonia-pinguini-pigoscelidi-zavodovski","headline":"The Largest Colony of Penguins Is No Longer","angle":"","publishedAt":"2026-10-08T12:23:33.000Z"},{"sourceName":"nin.rs","url":"https://nin.rs/magazin/vesti/125417/najveca-kolonija-pingvina-na-svetu-izgubila-dve-trecine-populacije-naucnici-zabrinuti","headline":"The Largest Colony of Penguins in the World Lost Two Thirds of Its Population: Scientists Are Worried About the Collapse of the Ecosystem","angle":"","publishedAt":"2026-10-08T10:12:00.000Z"},{"sourceName":"Telegraf – Najnovije vesti","url":"https://nauka.telegraf.rs/priroda/4410884-najveca-kolonija-ovih-pingvina-ekspresno-nestaje","headline":"The Largest Colony of These Penguins Is Rapidly Disappearing","angle":"","publishedAt":"2026-10-08T09:52:31.000Z"},{"sourceName":"Karar Gazetesi","url":"https://karar.com/guncel-haberler/arastirma-dunyanin-en-buyuk-penguen-kolonisinde-populasyonun-2077054","headline":"Study: More than a Quarter of the Population Has Died in the World's Largest Penguin Colony","angle":"","publishedAt":"2026-10-08T09:19:00.000Z"},{"sourceName":"NDTV","url":"https://ndtv.com/world-news/climate-change-strips-islands-title-of-largest-penguin-colony-study-12155600","headline":"Climate Change Strips Island's Title Of Largest Penguin Colony: Study","angle":"","publishedAt":"2026-10-08T08:59:21.000Z"},{"sourceName":"Merco Press","url":"https://en.mercopress.com/2026/10/08/what-was-the-world-s-largest-penguin-colony-has-lost-nearly-two-thirds-of-its-nests","headline":"What was the world's largest penguin colony has lost nearly two thirds of its nests","angle":"","publishedAt":"2026-10-08T07:55:14.981Z"},{"sourceName":"The Independent","url":"https://independent.co.uk/climate-change/news/chinstrap-penguin-colony-decline-zavodovski-b3063204.html","headline":"World’s largest penguin colony loses two-thirds of its population","angle":"","publishedAt":"2026-10-08T07:33:13.000Z"},{"sourceName":"The Independent (US)","url":"https://the-independent.com/climate-change/news/chinstrap-penguin-colony-decline-zavodovski-b3063204.html","headline":"World’s largest penguin colony loses two-thirds of its population","angle":"","publishedAt":"2026-10-08T07:33:13.000Z"},{"sourceName":"Habertürk","url":"https://haberturk.com/yasam/dunyanin-en-buyuk-penguen-kolonisinin-ceyreginden-fazlasi-oldu-3918057","headline":"More than a Quarter of the World's Largest Penguin Colony Has Died.","angle":"","publishedAt":"2026-10-08T06:45:27.000Z"},{"sourceName":"TVXS - TV Χωρίς Σύνορα","url":"https://tvxs.gr/news/perivallon/ereyna-i-megalyteri-apoikia-pigkoyinon-ston-kosmo-echase-schedon-ta-2-3-toy-plithysmoy-tis","headline":"Research / The World's Largest Penguin Colony Has Lost Almost 2/3 of Its Population","angle":"","publishedAt":"2026-10-08T06:22:02.000Z"},{"sourceName":"Great Yorkshire Radio","url":"https://greatyorkshireradio.co.uk/world/worlds-largest-penguin-colony-shrinks-two-thirds-in-just-14-years","headline":"World's Largest Penguin Colony Shrinks Two-thirds In Just 14 Years","angle":"","publishedAt":"2026-10-08T04:55:03.000Z"},{"sourceName":"khbrknews","url":"https://khbrknews.com/worlds-largest-penguin-colony-shrinks-two","headline":"World’s largest penguin colony shrinks two","angle":"","publishedAt":"2026-10-08T04:50:01.000Z"},{"sourceName":"The Japan Times","url":"https://japantimes.co.jp/environment/2026/10/08/wildlife/penguin-island-colony-climate-change","headline":"Climate change strips island’s title of largest penguin colony, study shows","angle":"","publishedAt":"2026-10-08T02:22:00.000Z"},{"sourceName":"KEZI 9 News","url":"https://kezi.com/news/spanish/la-mayor-colonia-de-ping-inos-del-mundo-pierde-m-s-de-medio-mill-n/article_da5eb3db-f743-562a-a6b6-28382440558e.html","headline":"The Largest Penguin Colony in the World Loses More than Half a Million Specimens","angle":"","publishedAt":"2026-10-08T01:47:32.000Z"},{"sourceName":"Anadolu Ajansı","url":"https://aa.com.tr/en/world/world-s-largest-penguin-colony-loses-nearly-two-thirds-of-population-amid-climate-change-study/4081613","headline":"World's Largest Penguin Colony Loses Nearly Two-Thirds of Population Amid Climate Change: Study","angle":"","publishedAt":"2026-10-08T01:32:58.048Z"},{"sourceName":"Sky News UK","url":"https://news.sky.com/story/worlds-largest-penguin-colony-shrinks-two-thirds-in-just-14-years-13596336","headline":"World's largest penguin colony shrinks two-thirds in just 14 years","angle":"","publishedAt":"2026-10-08T01:11:00.000Z"},{"sourceName":"KCRA 3","url":"https://kcra.com/article/chinstrap-penguins-island/74070602","headline":"This island was home to the planet’s largest penguin colony. 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Press Agency Rador","angle":"","publishedAt":"2026-10-07T16:23:32.735Z"},{"sourceName":"The Straits Times","url":"https://straitstimes.com/world/climate-change-strips-islands-title-of-largest-penguin-colony-study","headline":"Climate change strips Zavodovski island of largest penguin colony","angle":"","publishedAt":"2026-10-07T15:50:00.000Z"},{"sourceName":"Free Malaysia Today News","url":"https://freemalaysiatoday.com/category/world/2026/10/07/climate-change-strips-island-s-title-of-largest-penguin-colony","headline":"Climate change strips island’s title of largest penguin colony","angle":"","publishedAt":"2026-10-07T15:33:15.000Z"},{"sourceName":"cedarnews.net","url":"https://cedarnews.net/nederlands/1037416/half-miljoen-keelbandpinguins-zijn-verdwenen-sub-antarctische-eiland","headline":"Half a Million Chinstrap Penguins Have Disappeared From the Sub-Antarctic Island of Zavodovski.","angle":"","publishedAt":"2026-10-07T15:04:09.000Z"},{"sourceName":"National Geographic","url":"https://nationalgeographic.com/animals/article/worlds-largest-chinstrap-penguin-colony-collapsed","headline":"Inside the Collapse of Earth's Largest Penguin Colony","angle":"","publishedAt":"2026-10-07T15:01:34.861Z"},{"sourceName":"KIFI","url":"https://localnews8.com/cnn-other/2026/10/07/this-island-was-home-to-the-planets-largest-penguin-colony-heres-why-it-just-lost-that-title","headline":"This island was home to the planet’s largest penguin colony. 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