An Adélie stood at the edge of the colony, calling loudly to its mate.

The Adélie penguin waddled across the icy shore, carrying nesting material in its beak.

Adélie penguins huddled together on the ice, their black-and-white bodies a stark contrast against the endless white.

Scientists studying penguin colonies in Adélie Land documented shifts in breeding patterns over the past decade.