Fascinated by these otters? Here's fair warning: cute doesn't necessarily mean cuddly.

A red fox listens out for mice scurrying six feet beneath the snow before diving head first into the drift to snap up its prey.

In the Arctic circle, ducks take advantage of permanent holes in the sea ice, fighting the fierce ocean currents to dive 10 metres down and reach the rich layer of mussels that populate the sea floor. Beautiful underwater filming from BBC natural history masterpiece, Planet Earth.

Watch the awesome fight for survival as a grown male polar bear takes on a walrus colony at the edge of the Arctic circle. A truly epic battle, phenomenally captured in high quality, from the BBC natural history masterpiece, Planet Earth.

Breath-taking images of a wolf chasing and capturing a caribou in the wild. Brilliant images from BBC natural history masterpiece, 'Planet Earth'.

How does a mongoose stand up to a cobra? You might be surprised at the outcome.

Two huge male gorillas square off in the wild in a test of dominance. Which will emerge victorious?

See here how a wild camel produces excess saliva to impress a mate and warn other males of its ferocity. The desert is a dangerous place for seduction on the planet.

When it comes to hunting prey, spotted hyenas seem to know the secret: divide and conquer!

A chance to see springbok antelopes, the most successful grazing animals in the Southern African Kalahari desert as they attempt to ward off a family of hungry cheetahs by jumping up to two metres into the air.