The Utah Raptor, a skilled and powerful hunter, was discovered in central Utah, North America, in 1993.
This dinosaur is one of the largest and most powerful Raptors to have yet been identified. Utahraptor used its sharp, sickle-like claw to slash and rip apart larger plant-eating animals. It also used its long sharp teeth to bite and tear its victims.
It is believed by many scientists that Utahraptor was a warm-blooded animal. Fossil evidence shows that the inside of Utahraptor's bones was more like a modern day mammal than like that of a cold-blooded animal. This would have given Utahraptor a huge advantage over its prey.
The large cold-blooded, plant-eating dinosaurs would have been very slow each morning as they waited for the sunlight to heat their bodies to a point where they could move more quickly.
This would have been the perfect time for Utahraptor to attack. If it was warm-blooded, Utahraptor would have been fast moving no matter what the temperature outside.