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Zavodovski Island loses title of largest penguin colony

Chinstrap penguin population has declined by 63% since 2011, scientists report.

AI-assisted coverage comparison, editor-supervised · How this was made

Published

What this story says

  • 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.

Who covered it

Left 19%(11)Centre 71%(42)Right 10%(6)

Percentages are shares of the 59 outlets carrying a published leaning rating. 16 of the 75 outlets we know ran this story carry no rating and are not counted in them. Coverage measured .

Trust

60/100

Craft

65/100

Hype

30/100

75 sources · methodology

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.

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.

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.

Divergent population figures

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.

What the coverage left out

None of the left, centre, or right-rated reports printed below mention the macaroni penguin population increase on Zavodovski Island.

Still developing. We have re-checked which outlets are covering this 5 times, most recently on 8 Oct 2026, 19:30, and will add the sides that appear.

How each side covered it

Our own reading of the reporting listed below, written from the outlets’ articles rather than quoted from them. The reasoning is set out on our methodology page.

Left

11 rated outlets

  • Left-rated reports focused on the scale of the population collapse and its link to the climate crisis. Il Post, Merco Press, The Independent, The Independent (US), Common Dreams, Newser, and Cumhuriyet all highlighted the significant loss of penguins and attributed it to climate change or the climate crisis. Common Dreams used the word 'crash' to describe the population decline. Newser described it as an 'enormous crash'. Several reports, including The Independent and The Independent (US), noted the population fell from over a million to 400,000. Merco Press and Il Post stated the colony lost nearly two-thirds of its nests or specimens.

Centre

42 rated outlets

  • Centre-rated reports from KIFI, The Japan Times, KEZI 9 News, Sky News UK, KCRA 3, WCVB, WLWT, and WMUR led with the loss of the island's title as the largest penguin colony. KIFI and The Japan Times reported that more than half a million chinstrap penguins were lost between 2011 and 2025, with The Japan Times specifying over 680,000. Sky News UK stated the colony shrunk by two-thirds in 14 years. KEZI 9 News, KCRA 3, WCVB, WLWT, and WMUR used the headline 'This island was home to the planet’s largest penguin colony. Here’s why it just lost that title'.

Right

6 rated outlets

  • Right-rated reports from NDTV, khbrknews, Anadolu Ajansı, NOS, The Straits Times, and Free Malaysia Today News focused on the loss of the island's title due to climate change. NDTV and The Straits Times used the headline 'Climate Change Strips Island's Title Of Largest Penguin Colony'. Anadolu Ajansı reported the population fell by more than 680,000 between 2011 and 2025. NOS stated that climate change caused a rapid decline of chinstrap penguins on a British island, noting that in 2011, 900,000 hooded penguins and 90,000 macaroni penguins lived on Zavodovski Island.

Questions about this coverage

How did the left and right cover Zavodovski Island loses title of largest penguin colony?
Of the 59 outlets on this story carrying a published leaning rating, 19% are rated left, 71% are rated centre, 10% are rated right. Those percentages are shares of the rated outlets, not of every outlet that ran it, which was 75. The sections above set out what each side emphasised, in its own terms.
Is Zavodovski Island loses title of largest penguin colony left or right?
The story itself is neither. What can be counted is who has covered it, and 71% of the 59 rated outlets on it are rated centre — so far this is a story carried mostly by the centre. Coverage is still arriving and that can change, which is why the figure is dated rather than fixed.
Is the coverage of Zavodovski Island loses title of largest penguin colony biased?
Zavodovski Island loses title of largest penguin colony is one event reported by 75 outlets, and this page does not rate the story as biased or unbiased. What it publishes is the spread: which outlets ran it, where named rating organisations place each of them on the spectrum, and what each side chose to lead with. A leaning rating describes an outlet's record over time, not this article, and the two should not be run together.
Which outlets covered Zavodovski Island loses title of largest penguin colony?
75 that we know of, every one of them listed further up this page with a link to its own report and to what we hold on the publisher. Nothing here is a summary of somebody else's summary: the outlets are named so the original reporting can be read.
Why has Zavodovski Island lost its title as the largest penguin colony?
Zavodovski Island has lost its title because the chinstrap penguin population has declined by 63% between 2011 and 2025. Scientists attribute this significant drop to human-driven climate change, which is warming the ocean and disrupting the krill population that the penguins rely on for food.
How many penguins have been lost from Zavodovski Island?
More than half a million chinstrap penguins have been lost from Zavodovski Island since 2011. Some reports specify this figure as over 680,000, while others state the population fell from over a million to 400,000.
What is the cause of the penguin population decline?
Scientists attribute the decline to human-driven climate change. The warming ocean is disrupting the krill population, which is the primary food source for chinstrap penguins. This makes it difficult for them to survive and reproduce in their habitat.
Has every penguin species on the island declined?
No, not all penguin species on Zavodovski Island have declined. While the chinstrap penguin population has fallen dramatically, the macaroni penguin population increased by 28% between 2011 and 2016, and has remained stable since then.

Read it at the source

75 outlets, grouped by the leaning a published rating gives them. Every headline links to the original; an underlined outlet name opens our profile of that publisher.

Left

11
Show 3 more

Centre

42
Show 34 more

Right

6

Not rated

16
Show 8 more

How did this read?

About the coverage, not about the story. We do not ask whether you agree with what happened — we have no honest use for that answer.

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