Dryosaurus, the "Tree Lizard," was a speedy little creature from the late Jurassic that fans find endearing due to its adorable looks. With a maximum legnth of about four meters and a height of two meters, Dryosaurus was on the smaller side during a time of titans. These small creatures required a well-built body to remain away from the wide maws of predators. Its strong legs made it a swift runner, and its stiff tail served as an effective counterbalance that allowed it to be incredibly agile. Considering the dangerous carnivores of the time, Dryosaurus' speed was quite necessary to evade the likes of Ceratosaurus and Allosaurus. Scampering across the semiarid environments of what is now the western United States, Dryosaurus lived in forested habitats near rivers and floodplains alongside many famous titans, such as Diplodocus and Stegosaurus. While the mighty sauropods fed upon high vegetation, Dryosaurus elected to browse lower hanging plants for sustenance. Like other ornithopod dinosaurs, it had a beak on its mouth that assisted in chewing plant matter; in addition, its cheek structure allowed it to hold food in its mouth while chewing, like human cheeks, preventing any unnecessary food loss.