Kevin Schafer / Adelie Penguin (Pygoscelis adeliae) group jumping off iceberg, Brown Bluff, Antarctic Peninsula, Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) group diving off iceberg, Paulet Island, Antarctica

Stephen Belcher / Adelie Penguin (Pygoscelis adeliae) jumping from iceberg, Antarctic Peninsula, Antarctica

Kevin Schafer / Adelie Penguin (Pygoscelis adeliae) pair, Antarctica

Jan Vermeer / Adelie Penguin (Pygoscelis adeliae), Antarctica

Jan Vermeer / Adelie Penguin (Pygoscelis adeliae) trio on ice, Antarctica

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) standing on iceberg agitated, western Antarctica

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) chick begging parent for food, western Antarctica

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) flapping wings, Holtedahl Bay, Antarctica

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) spreading and flapping wings, Armstrong Reef, western Antarctica

Yva Momatiuk & John Eastcott / Adelie Penguin (Pygoscelis adeliae) pair, Armstrong Reef, western Antarctica

Suzi Eszterhas / Adelie Penguin (Pygoscelis adeliae) standing on iceberg, Paulet Island, Antarctica