Hadrosauroids are a group of ornithopods within Iguanodontia, and most notable by having duck-shaped muzzles(hence their nickname "duckbills").
Hadrosaurs originated in the middle cretaceous and ended at the end of the cretaceous.
Hadrosauroids are a group of ornithopods within Iguanodontia, and most notable by having duck-shaped muzzles(hence their nickname "duckbills").
Hadrosaurs originated in the middle cretaceous and ended at the end of the cretaceous.