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Dilophosaurus was about 20 feet (6 meters) long, and about 5 feet (1.5 meters) tall at the hips. It weighed around 1,000 pounds (450 kilograms).
The most unusual feature of Dilophosaurus are the pair of crests on its skull (it is from this feature that it gets its name, which means "two-crested lizard"). It is thought that these crests were probably used for display, probably attracting mates, and may have been large in one sex than the other.
Dilophosaurus featured in the first of the Jurassic Park movies (and in the Jurassic Park novel). In the movie depiction, it appears a bit of creative license was used:
Dilophosaurus was a carnivore (meat-eater) that lived from 200 to 190 million years ago
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