Utahraptor is the largest of the dromaeosaurs, which are also known as raptors. It measured about 6 or 7 metres long and would have weighed more than a polar bear. It had a huge claw on each hind foot which it held clear of the ground as it ran to keep it sharp and ready for action. Its hind limbs were relatively stocky, since it needed power rather than speed to use the deadly claws to kick or cling on to struggling prey. The claws on its hands were also larger and more blade-like than those of other raptors.
Scientific name: Utahraptor
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Additional data source: Animal Diversity Web
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