Drop Bears

The Drop Bear is described as an arboreal, (tree dwelling) carnivorous mammal of Australia, Phascolarctus Hodgsonii, growing to around 4 feet in height. This description is not far wrong. Believed to have evolved from a similar line to koalas, Drop Bears vary from 3 to 5 feet in hight, but are extremely strong. They are covered in a dense fur, which can range from almost black to the Alpine Drop Bear's snowy white coat. They have broad shoulders and razor sharp claws on all four limbs. They are able to walk for short distances on two legs, but are much faster on all four, being capable of bursts of speed approaching 60 km/h at full gallop. Their heads are similar to those of koalas, but with enlarged canine teeth, not unlike those of bears or other carnivorous animals.

These things are killers :p