The Adélie penguin is a truly Antarctic creature—one of only four penguin species to nest on the continent itself. During the breeding season, they need bare, rocky ground on which to build their rough nests of stones. Two eggs are laid; these are incubated for 32 to 34 days by the parents taking turns (shifts typically last for 12 days).
The birds live most of their lives on sea ice, far from land. Adélie penguins living in the Ross Sea region migrate an average of about 13,000 kilometres (8,100 mi) each year as they follow the sun from their breeding colonies to winter foraging grounds and back again.