Utahraptor is the largest member of the dromaeosaurids - almost twice the size of its more famous relative, Velociraptor. Like its smaller cousins, Utahraptor hunts in packs - a truly terrifying prospect, since a group of these hunters are more than capable of taking down all but the very biggest dinosaurs.
Teeth and claws
Like the rest of the raptor family, Utahraptor has a large sickle-shaped claw - over 30 centimetres (almost 1 foot) - on each foot, which it uses to stab its prey. A single blow to the windpipe is enough to kill another animal. Utahraptor also has a series of sharp teeth, which like those of many predators, are serrated to ease cutting through flesh.
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