Triceratops

A massive quadrupedal dinosaur, broad-shouldered and built like a battering ram. The triceratops's signature is the bony neck frill and the three forward-facing horns — two long brow horns over the eyes and a shorter nasal horn. Hide is thick, leathery, and mottled brown-green.

In encounter, a triceratops is a herd herbivore that responds to threats with a flat-out charge: head down, frill set, the full mass of the animal driven onto its horns. Predators big enough to kill one (allosaur, tyrannosaur) generally try ambush, not direct confrontation.