Anatomy: Saurolophus had a 5 inch (13 cm) long bony spike extending up from its forehead. Saurolophus was about 30-40 feet (9-12 m) long, had a toothless beak whose top bill curled slightly upwards, had cheek teeth, and could walk on two or four legs. The rear legs were much larger than the front legs.

Diet: Saurolophus was an herbivore, a plant-eater. It had hundreds of closely-packed cheek teeth that ground up its food.

Fossils: Fossils of this duck-billed dinosaur have been found in Alberta, Canada, and Mongolia. Saurolophus was named by paleontologist Barnum Brown in 1912. The type species is S. osborni.