A tiger cub yawning.

A tiger cub crawling along the ground.

An American black bear cub sits on the forest floor, chewing a long branch. It then falls backwards onto its mother. When the mother bear tries to nurture her cub, the cub starts to play fight.

A restless American black bear cub sits on the forest floor, playing with a long branch.

An American black bear cub plays against a tree then wanders off to join another cub and the mother bear.

A restless American black bear cub sits on the forest floor, chewing a long branch, then sticking out its long tongue.

Brown bear mother and its three cubs walk by a pond. One of the cubs runs nearer to the camera, rises on its hind legs and then quickly runs back to its mother and siblings.

China: Point of view (POV) shot of a panda cub walking towards the camera, its black eyes and ears contrasting against the white fur of its head.

A tiger cub drinking from a bottle of milk.

Brown bear mother and its three cubs walk by a pond, all looking very happy.

An American black bear cub sits calmly on the forest floor. Another bear behind it looks around the forest.

Chukotka, Russia: Shots following a female polar bear with cub, swimming at the surface of the ocean with a mountain range in the background.

Brown bear mother and three cubs walk by a pond. One of the cubs wades through water.

A lioness playing with its cub in a zoo enclosure. The cub then goes to play with its sibling and starts playfully biting it.

A bear swimming in water.

Heligoland, Germany: A white seal pup peering into the camera with its large, dark eyes.

Heligoland, Germany: A close up view of a seal pup resting its head on sand and looking around with its large, dark eyes.