parasaurolophus

Describes what is known about three different types of dinosaurs that lived in parts of the United States and Canada from 140 to 65 million years ago.

Describes the physical characteristics and behavior of this crested, duck-billed dinosaur.

Describes prehistoric life with emphasis on the parasaurolophus. Discusses its food, daily activities and predators.

Describes the physical characteristics and probable behavior of this duck-billed dinosaur.