Dilophosaurus

A carnivorous theropod dinosaur from the beginning of the Jurassic (about 200 million years ago), the Dilophosaurus could measure up to 20 feet long and had to weigh around 1100 pounds. Joints allowed him to squint the two bony ridges of his skull that make his peculiarity, and gave him his name (lizard with 2 crests in Greek).