Mountain hares in Scotland during the cold winter season.

Cape gannet diving for fish off Port St. Johns, Wild Coast, Eastern Cape, South Africa.

Orangutans are carpenters! These highly intelligent great apes build beds in the treetops. To construct a bed that will support its weight, an orangutan selects branches, cuts them, and skillfully weaves them together.

Kingfishers in Taipei, Taiwan.

Sea angels are small translucent orange marine creatures, about 3-5 centimetres in length. They float through the water column by slowly flapping their muscular wings. Graceful swimmers, sea angels are beautiful to watch. Their wing-like fins propel them in a manner reminiscent of flying, which is partially why they are commonly known as sea angels. Sea angels are also fairly translucent, creating an almost ethereal illusion. The translucent skin allows for view of their internal organs, like their gonads, which are a pretty pink and orange hue.

These nine Mute Swan cygnets have just hatched and huddle together in the nest while their parents go for a swim (in Heemskerk, the Netherlands).

Sloths thrive in the tropical rainforests of Central and South America. Whilst slow on land, they are excellent tree climbers, and even good swimmers. Aren't they cute?

Little owl perched on a sunflower in Cadiz, Andalusia, Spain.

Greater flamingos in Walvis Bay, Namibia.

A brown bear sow with her cub, in Katmai National Park and Preserve, Alaska.