Triceratops is easily recognizable with its large bony collar. PAPO strove to reproduce all its peculiarities: its three horns, large legs and a muzzle with a beak called "parrot" which allowed him to easily tear grass and leaves. This quadruped, reminiscent of the rhinoceros, lived in North America during the Upper Cretaceous period, at the same period as the dreaded Tyrannosaurus of which it was the prey. It measured between 26 and 30 feet long, and reached 10 feet in height.