Emperor Penguins Officially Classified as Endangered Species—Half Could Vanish by the 2080s
Emperor penguins are now endangered after major population declines tied to melting sea ice.
Emperor penguins—the tallest, most iconic penguin species on Earth—have officially been classified as endangered after rapid population declines driven by vanishing sea ice.
The International Union for Conservation of Nature (IUCN), which maintains the Red List widely regarded as the most comprehensive global inventory of the conservation status of animal, fungus and plant species, announced the updated classification alongside two other Antarctic species. Antarctic fur seals were also listed as endangered, while the southern elephant seal was reclassified as vulnerable.
The numbers behind the decision are striking.
Emperor penguins face rapid population decline
Satellite data indicates that emperor penguin populations declined by approximately 10% between 2009 and 2018, representing more than 20,000 adult birds, according to the IUCN. Projections suggest the population could be reduced by half by the 2080s.
But Western Antarctica is faring far worse. WWF-funded research using satellite imagery estimates a 22% population decline in that region between 2018 and 2023, exceeding previous model predictions.
Emperor penguins depend on stable Antarctic sea ice for breeding, raising chicks and molting for at least nine months of the year. Since 2016, sea ice levels have declined significantly. In 2022, four out of five known breeding sites in the Bellingshausen Sea experienced collapse, resulting in thousands of chicks freezing or drowning.
“After careful consideration of different possible threats, we concluded that human-induced climate change poses the most significant threat to emperor penguins,” said Philip Trathan, at the British Antarctic Survey, and a member of the IUCN Species Survival Commission, in a statement. “Early sea-ice break-up in spring is already affecting colonies around the Antarctic, and further changes in sea-ice will continue to affect their breeding, feeding and moulting habitat.”
Half of all known emperor penguin colonies are struggling
A 2025 study involving researchers Sharon Robinson and Dana Bergstrom documented widespread breeding failures across emperor penguin colonies.
“Of the 60-plus known emperor colonies around the coast, about half have experienced increased or complete breeding failure events since 2016 due to early fast-ice loss, and 16 colonies have suffered two or more such events,” says Bergstrom. Fast ice refers to sea ice that is attached to the coast or seabed.
“This adds an Antarctica-wide context to the more extreme picture occurring on the Antarctic Peninsula, where we have seen chicks drown through early sea-ice breakout,” she says.
Research from Robinson at the University of Wollongong indicates that emperor penguins may be among the most threatened Antarctic species. In 2022, she and colleagues assessed extinction risk, projecting potential extinction by 2100.
“As global heating warms the oceans and melts the sea ice, this removes the breeding places which allow emperors to reproduce successfully,” Robinson said in a statement. “Like most birds and mammals, penguin chicks need a safe place to develop, and human actions are removing that stable platform at a rapid pace.”
Other Antarctic species are also in trouble
Emperor penguins are not the only Antarctic species facing crisis. The Antarctic fur seal population has declined by more than 50%, falling from over 2 million mature individuals in 1999 to 944,000 in 2025, with climate change cited as a key driver.
Southern elephant seals are experiencing population stress as well, with avian flu contributing to high mortality rates. The IUCN reported that the virus is killing more than 90% of newborn pups in some colonies.
What comes next
The World Wide Fund for Nature is urging governments to limit global warming to 1.5°C and to designate emperor penguins as a Specially Protected Species at an upcoming Antarctic Treaty Meeting in Japan.
The organization emphasized that the future of emperor penguins is closely tied to climate action, stating that reducing reliance on fossil fuels and limiting global temperature rise to as close as possible to 1.5°C is critical to preventing further losses.
Conversation
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