Edmontosaurus is a large duck-billed dinosaur that is part of the family of Hadrosaurus. It was common prey for large dinosaurs like T-rex. It can move at 35 miles per hour. It lived in groups of its own species so they can protect themselves. But unlike most hadrosaurus, Edmontosaurus did not hoot or honk like most hadrosaurus due to the lack of crest on its head.