Two young polar bears (Ursus maritimus), feeding side-by-side on a fresh bearded seal kill on Spitsbergen, Svalbard, Norway

Adult black-legged kittiwake (Rissa tridactyla) in combat with a second kittiwake near Alexander Island, Franz Josef Land, Russia, Arctic Ocean, Eurasia

Chacma baboons (Papio ursinus) playfighting, Chobe National Park, Botswana, Africa

South American Sea Lions (Otaria byronia), Ballestas Islands, Paracas, Peru, South America

Adelie penguin (Pygoscelis adeliae) adult defending chick against a skua on Torgersen Island, Antarctica, Polar Regions