Dryosaurus (name meaning "Oak Lizard") is a genus of an ornithopod dinosaur that originated during the Late Jurassic period in what is now North America, Europe, and Africa. Measuring around 4 meters long and weighing 100 kg, this small hypsilophodont dinosaur is an early relative of the iguanodont family of the Cretaceous period.
In the episode "Land of Giants II: Ballad of Big Al", a flock Dryosaurus were brought to the park from Late Jurassic Wyoming, 150 million years ago. They reside in the Ostrich Paddock Enclosure.
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Dryosaurus skeleton