Deinonychus

This fast carnivore is sometimes called a velociraptor, though that name properly belongs to a much smaller creature. A deinonychus is bright green along its back and flanks, with a much lighter shade of the same color on its underside. The body has darker spots or stripes. Its tail extends straight out behind itself, held aloft by an intricate structure of bony supports, thus allowing its weight to be carried entirely by its back legs. It weighs about 600 pounds.