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Corythosaurus was a large, plant-eating, duck-billed dinosaur (family Hadrosauridae). It was about 30-33 feet (9-10 m) long, 6.6 feet (2 m) tall at the hips, and may have weighed up to 5 tons.
It had a hollow, bony crest on top of its long head in the shape of a helmet flattened on the sides (Corythosaurus means "helmet lizard"). Corythosaurus' nostrils went up through the crest. The crest may have been used to make sounds, as a cooling device, courtship displays, and/or as a sense-of-smell enhancer (Corythosaurus' olfactory lobes, the part of the brain that sense smell, were located within the crest). Males had larger crests than females and juveniles.
Corythosaurus had a toothless beak and hundreds of cheek teeth that it used to grind up its food. It walked on two legs (or four), had shorter arms, and a long, heavy tail. It had no natural defenses. Its femur (thigh bone) was 108 cm long.
Corythosaurus was a herding animal that may have migrated from shorelines to higher ground to reproduce.
Corythosaurus was an herbivore, perhaps eating pine needles, conifers, ginkgos, seeds, cycads, twigs, and magnolia leaves.
Corythosaurus was an ornithopod, whose intelligence (as measured by its relative brain to body weight, or EQ) was midway among the dinosaurs.
A Hadrosaur footprint.
Corythosaurus belonged to the following:
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