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Utahraptor was a giant dromaeosaurid from the Early Cretaceous of, you guessed it, Utah. It was one of the largest dromaeosaurs, while typical specimens are 4.5 m (~15 feet) long, the largest specimens may have pushed 6 meters (20 feet). This puts Utahraptor in the top dromaeosaur size-class, which also includes the Asian Achillobator and the South American Austroraptor. Utahraptor was heavily built, with an enlarged sickle-shaped claw on the second toe of each foot. While it was probably feathered like other dromaeosaurs, the reduced arm size and shorter, more flexible tail suggest any wing or tail fans had stopped playing an aerodynamic role in locomotion.
