Chinstrap penguin population on Zavodovski Island halves since 2011

A British Antarctic Survey study reports a dramatic decline in chinstrap penguin numbers on Zavodovski Island between 2011 and 2025, with the population dropping below half of previous estimates. The cause is attributed to a chain of environmental events, likely linked to climate-driven changes in sea ice and prey availability. This signals a significant ecological shift in the Antarctic ecosystem, with implications for biodiversity and food web stability.