Dilophosaurus, the "Two Crested Lizard," is a dinosaur made famous by the movie Jurassic Park's fictitious size, frill, and venomous spit. The real Dilophosaurus was  just as fascinating without the  fabricated details and is just as beloved by dinosaur fans. With a  maximum length of about six meters long and a height of almost two  meters tall, the Dilophosaurus was about the same height as an adult  human. It grew rapidly with age, and by the time it was an adult it could  feed upon many small dinosaurs.  Several Dilophosaurus fossils  preserving deformities such as  injuries and tumors have been found,  giving us insight into the stressful  environments and ailments that these creatures lived with.  Roaming North America during the  early Jurassic Period, Dilophosaurus enjoyed arid environments that few known creatures lived in. As one of  the largest carnivores of the time, the Dilophosaurus asserted itself in the food chain. To satiate its  appetite, the Dilophosaurus likely fed on small armored herbivores or  heterodontosaurids. It may have also fed upon aquatic life as evidenced  by swim track trace fossils. Its  famous head crests were used for  display in order to attract a  suitable mate, and they likely  doubled as a form of identification  between Dilophosaurs.