Caption:
20040908 - Canada - Alberta : Royal Tyrrell Museum Chasmosaurus This ceratopsian had a single horn on its snout and two smaller horns above its eyes. Although rival males may have battled over mates, they probably also scared off potenial opponents by dropping their heads to display the large frill. Chasmosaurus belli Late Cretaceous, Dinosaur Provincial Pack, Alberta Caption word by Royal Tyrrell Museum