Frederique Olivier / South polar skua (Stercorarius maccormicki) chick at nest site feeding from a piece of eggshell, Antarctica.

Jamie Unwin / Tracking shot of Cheetahs (Acinonyx jubatus) walking towards shade and then sitting in it during noon, Kenya.

Jabruson Motion / Eastern mountain gorilla (Gorilla beringei beringei) juvenile peering over small branch and then looking inquisitively at the camera. The animal moves away and sits down with male gorilla, in the back...

Jabruson Motion / Eastern mountain gorilla (Gorilla beringei beringei) female walking through vegetation and then sitting down on her day bed, Virunga National Park, Democratic Republic of Congo. 1996.

Jabruson Motion / Eastern mountain gorilla (Gorilla beringei beringei) juvenile looking at the camera and swinging on a overhanging vine. The young gorilla stops playing and sits down in the vegetation. Virunga Nationa...