Some smaller dinosaurs may have hunted in packs, like modern wolves. By working together they would have been able to kill much larger animals.
Deinonychus was about the size of a human adult male, and was lightly built so it could run fast.
This hunter had a very stiff tail, which it probably used to steer itself and change direction quickly while chasing its prey. Like other theropods, Deinonychus had very sharp teeth, and it also had powerful arms with grasping claws. The most unusual feature was a large upturned claw on its foot, which could be swivelled downwards so that it could slash its prey with its muscular hind legs. This probably killed the prey due to loss of blood.
Picture credit: google
