Parasaurolophus was a bipedal, herbivorous ornithischean dinosaur that dwelt in what would become the North American midwest during the late Cretaceous period. It is recognizable for the long, blunt crest protruding from the back of its skull. Although the exact purpose of this crest is a matter of some debate, aesthetic value, temperature regulation, and even vocalization have all been proposed as possible uses for the formation.
Parasaurolophus could walk on two or four legs, depending on the situation. It was 30 feet long, fully grown.
In art, Parasaurolophus is often discerned by its beak and distinctive crest, which varies in length as determined by the species depicted.