Velociraptor

Velociraptor in real life, was a genus of dromaeosaurid theropod dinosaur from the Late Cretaceous period which inhabited what is now the Mongolia-China border. Velociraptor was no bigger than a wolf and with its feathers it bore a very bird-like appearance. It had a long claw ("terrible claw") on the second toe of both feet, 8cm. (3in.) long, which he probably used as a weapon. Velociraptor was the first dromaeosaurid be discovered (1923) and is still the most well known to paleontologists, with over a dozen recovered fossil skeletons - the most of any other member of its family. Since it's appearance in the first film, it has become a symbol of Jurassic Park and has appeared in Jurassic Turok. They are one of the antagonists of the series, but are killed by on of the T-Rexes. In the Jurassic Turok, the term "Velociraptor" is applied to the genus of another dromaeosaurid dinosaur known as Deinonychus. The follows of the unusual taxonomy created by Gregory S. Paul, who believed that Deinonychus, as well as a few other species of dromaeosaurids, could be classified under the genus "Velociraptor". This is why the Velociraptors in the series are so large.

More real-life information: Velociraptor on Wikipedia.