Water Bears, they can survive in boiling water and freezing arctic conditions.  They are also able to withstand 1,000 times more radiation that humans.

These normally shy creatures have also been known to run after victims and attack even after the victim is no longer a threat to the bird.

sprint at speeds of 16 km per hour, outrunning most predators easily.

world’s fastest snakes, despite also being one of the world’s largest snakes, averaging 8 feet in lenght.  Add to the speed and size the mamba’s venom, which is strong enough to kill 50% of the humans that it bites.