Hypsilophodon was a peaceful dinosaur. He ate only plants, usually very small, leaves and shoots of trees, thanks to its horny beak at the front of the snout, beak that looked elsewhere much like turtles. Like many other ornithopods, Hypsilophodon was provided with long and muscular hind legs, with thin and light bones that allowed him to run at full speed when it was raced by a carnivore. He used his long tail, like many dinosaurs of this species, rocker, and had, therefore, no difficulty escape predators like eotyrannus and Neovenator
He has not appeared in the documentary but he made an appearance in the Lost World 2001 with the same animation "Walking with Dinosaurs".