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

Leopard geckos have predators, such as snakes, frogs, or foxes.

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'.

A rat snake may look like it's related to this King Cobra, but the cobra prefers to think of the rat snake as lunch!

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

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

All eyes are watching. All of her eight eyes that is - and when the female Emperor Scorpion beckons, her male counterpart must be very cautious!

Who cares about fire breathers? This dragon has enough bacteria in its mouth to kill its victim with one bite. Watch to see what other tricks it has.

A three pound ostrich egg is a tough meal to crack - unless you're a tool-using vulture with just the right technique.