# Antarctica's penguin colony sends climate distress signal

> The world's largest penguin colony has collapsed by two-thirds since 2011, signalling wider ecosystem breakdown driven by ocean warming.
- Title: Antarctica's penguin colony sends climate distress signal
- Summary: The world's largest penguin colony has collapsed by two-thirds since 2011, signalling wider ecosystem breakdown driven by ocean warming. Chinstrap penguins…
- Keywords: chinstrap penguins, zavodovski island, antarctica, climate change, ocean warming, ecosystem collapse, british antarctic survey, news, culture, Antarctica's, penguin, colony
- Source: Vox — https://vox.com/climate/505726/chinstrap-penguins-zavodovski-colony-collapse-ocean-warming
- Author: Jonathan Watts
- Published: 2026-10-09T10:45:00+00:00
- Read time: 1 min
- Topics: chinstrap penguins, zavodovski island, antarctica, climate change, ocean warming, ecosystem collapse, british antarctic survey, news, culture
## World's largest penguin colony collapses
The chinstrap penguin population on Zavodovski Island, the northernmost of the South Sandwich Islands in Antarctica, has declined by two-thirds since 2011.
## Half a million penguins lost from one island
Professor Norman Ratcliffe, a penguin ecologist at the British Antarctic Survey, called it an enormous population crash equivalent to half a million breeding individuals being lost.

> It is an enormous population crash, equivalent to half a million breeding individuals being lost from that island.
## Climate warming pushes Antarctic temperatures up
Human-driven heating has pushed winter temperatures on and around the Antarctic Peninsula to five degrees Celsius above preindustrial levels, one of the fastest rises in the world.
## Warming waters force krill south
Chinstrap penguins prefer cooler waters northwest of the island where they find Antarctic krill, their main diet. As waters warm, krill have moved south into the Weddell Sea.
## Macaroni penguins rise but cannot compensate
Macaroni penguins, less fussy eaters, saw numbers rise thirty percent. But Ratcliffe said this offers only small comfort because if trends continue, all penguins will run out of space.
## Penguin loss threatens entire food web
Ratcliffe warned that losing chinstrap penguins would have wider repercussions. He compared ecosystems to a giant Jenga set where removing each component increases the risk of complete collapse.

> Each ecosystem could be regarded as like a giant Jenga set, and every component that you remove increases the risk of ecosystems collapsing completely.
## Key takeaway

Chinstrap penguins on Zavodovski Island in Antarctica have declined by two-thirds since 2011, likely due to climate-driven ocean warming that has pushed their food sources south.