Parasaurolophus, the "Near Crested Lizard," was a very nasally ornithopod, making it an odd but well-liked dinosaur in the eyes of its adoring fans. With an estimated length of nine and a half meters and a maximum height of three-to-four meters, it was a heavily-built dinosaur that could switch between bipedal and quadrupedal postures at will. Its odd crest is a point of interest to fans and scientists alike, with multiple hypothesized functions. For both sexes, the crest likely acted as a sign of recognition between members of herds. For males specifically, though, it was probably for attracting potential mates. Its crest may also have helped with thermoregulation, depending on if there was a flap of skin connecting the crest to the head or not. It may have also served as a resonating chamber used for producing loud and low bellows, which could alert all members of a herd to danger. Roaming North America during the Cretaceous, Parasaurolophus lived along fellow herbivores like Corythosaurus and carnivores like Gorgosaurus. It grinded plants in a chewing-like motion, with its beak cropping plant matter while its cheeks holding it firmly in its mouth. Parasaurolophus fed upon plants of varying heights due to its range of postures.