Brachylophosaurus was a mid-sized herbivorous dinosaur, a member of the hadrosaur family. It is known from several skeletons and bonebed material from the Judith River Formation of Montana and the Oldman Formation of Alberta.
This animal had a bony crest, a flat, paddle-like plate over the top of the skull. Some individuals had crests that covered nearly the entire skull roof, while others had shorter, narrower crests. Other notable features are the unusually long forelimbs and the beak of the upper jaw being wider than other contemporary hadrosaurs.
Brachylophosaurus a hadrosaur. It reached an adult length of 9 meters (30 ft). Like other hadrosaurs, Brachylophosaurus had cheeks to keep food in the mouth while it chewed with its hundreds of close-fitting teeth. These teeth could be used to chew efficiently, a feature rare among reptiles, but common among Ornithischia like Brachylophosaurus.