Psittacosaurus had a beak just like a parrot! This dinosaur was an early relative of the horned dinosaurs, and lived during the Early Cretaceous period. The primitive horned dinosaurs had only small, bony cheek horns whereas their later relatives, such as Centrosaurus, had well developed horns and large neck frills. Paleontologists believe that unlike later horned dinosaurs, Psittacosaurus spent most of its time on its two rear legs, perhaps using its front limbs to grasp the plants it ate. Fossils of this dinosaur, like those of many other early ceratopsians, have been found in Asia.