Hadrosaurids or duck-billed dinosaurs were members of the family Hadrosauridae, and include ornithopods such as Edmontosaurus and Parasaurolophus. They were common herbivores in the Upper Cretaceous Period of what are now Asia, Europe and North America.
Hadrosaur in "Hatching Season" Edit
Paleontologist Paula Shaffer traveled back to Upper Cretaceous Montana to do a field-study on hadrosaurs. During her study, she imprinted on a new-born hadrosaur, and then found herself in a stampede as the herd fled from attacking gorgosaur. While she and her infant hadrosaur were lost overnight, Paula had come to believe that hadrosaurs instinctively hatched in the same areas. Paula tested the theory by setting the infant on the ground, and then following it back to the nest.