Styracosaurus was a plant-eating dinosaur that lived about 75 million years ago. It walked on four legs and was about the size of a car. It had a big bony frill on the back of its head with long spikes sticking out, and a large horn on its nose. Its body was strong and covered in thick skin. Styracosaurus lived in what is now Canada, in grassy, forested areas. It likely moved in herds and ate low-growing plants like ferns.