Category:Duck-billed dinosaurs

The hadrosaurids are known as the duck-billed dinosaurs due to the similarity of their head to that of modern ducks. In some genera the whole front of the skull was flat and broadened out to form a beak, ideal for clipping leaves and twigs from the forests. The back of the mouth contained literally thousands of teeth suitable for grinding food before it was swallowed. They were common herbivores in the Upper Cretaceous Period of what are now Asia, Europe and North America.

More real-life information: Hadrosaurid at Wikipedia.