Plant-eating dinosaurs are called herbivores, a Neo-Latin term that literally means "herb eater." Long-necked, herbivorous dinosaurs reach high into trees to eat green leaves and fruits, while the short-necked dinosaurs graze on grass and other low-lying vegetation. Herbivores are preyed upon by carnivorous dinosaurs, such as Tyrannosaurus Rex.
Herbivorous dinosaurs first appeared during the Late Triassic period and died at the end of the Cretaceous period, which spanned from approximately 230 million to 65 million years ago, respectively. Herbivorous dinosaurs include such species as Stegosaurus, Triceratops, Brontosaurus and Brachiosaurus.
Approximately 700 different species of carnivorous, herbivorous and omnivorous dinosaurs have been discovered and named by palaeontologists.