The Dilophosaurus has a slender figure and a distinctive appearance. Does it seem familiar to you? That's right, they had wonderful performances in "Jurassic Park". Of course, their name comes from the pair of tall bony crests on their heads. The bony crests of the Dilophosaurus are semi - circular, thin and brittle, and can serve as "ornaments" to attract the opposite sex during the breeding season. In addition, paleontologists speculate that the bony crests may only be present in male Dilophosaurus. There are many species of Dilophosaurus, such as Dilophosaurus wetherilli and Dilophosaurus sinensis. They all have crests and together form the Dilophosaurus family.