Iconic penguin colony sees “population collapse,” study finds

A remote island near Antarctica, Zavodovski, has experienced a dramatic decline in its chinstrap penguin population, losing over 680,000 penguins between 2011 and 2025 due to climate-driven changes affecting their food supply. The British Antarctic Survey (BAS) study, published in Current Biology, highlights that the chinstrap population on the island fell from 1.09 million to 402,000, a 63% decrease. This decline is attributed to a reduction in krill, their primary food source, rather than the 2016 eruption of Mount Curry volcano. Meanwhile, the macaroni penguin population on the island increased, now outnumbering chinstraps. The findings suggest that chinstrap penguins should be reclassified as “endangered” by the International Union for Conservation of Nature (IUCN). The Adelie penguins of Cape Adare now hold the title of the world’s largest penguin colony. QUESTION: How might the decline in chinstrap penguins on Zavodovski Island impact the broader ecosystem and food chain in the region?