If it can fit in its mouth , a bullfrog will go after anything, even its own kind!

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.

The odd Tasmanian devil has a huge head to power its massive jaws. It also has an unsettling array of sounds.

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'.

Don't doze off just yet. Maybe they should be called bed blood bugs, an army of these can attack a person 500 times in one night!

They may kill snakes, but what happens when a pack of mongooses encounter the largest stork in the world?

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

A sea eagle snatches a venomous sea snake from the water.