Ice Edge Journey shows an emperor penguin colony on the Ekström ice shelf, in Atka Bay, Antarctica. It was taken by Bertie Gregory, from the UK, who saw most of the fledgling chicks using ice ramps to enter the sea to hunt for food. But this group missed the easy way down and took a 15-metre (50ft) leap into the water. Scientists say the decline of sea ice in Antarctica may force more penguins to breed on ice shelves, making this behaviour increasingly common in the future. Photograph: Bertie Gregory/2025 Wildlife Photographer of the Year
