Ornithopods

The Ornithopods are a wide group of dinosaurs containing Hadrosaurs, Iguanodonts, Dryosaurs, Rhabdodonts, and many others.

They should definitely not be confused with the Ornithischians, which are a larger group containing all Ornithopods plus Heterodontosaurs, Ceratopsians, Pachycephalosaurs, Stegosaurs and Ankylosaurs, among others.