Apatosaurus belongs to a group of dinosaurs called the sauropods. These herbivorous (plant-eating) dinosaurs consists of the largest animals that ever lived on land.

Stegosaurus

Stegosaurus was an unusual-looking herbivorous dinosaur found in the Morrison Formation of the Rocky Mountain west.

Tyrannosaurus rex was the largest carnivorous dinosaur that lived in North America. It may have been an active hunter, but it also was a likely scavenger as well.