Ornithomimus are dinosaurs that appear in Disney's Fantasia.
The Ornithomimus is a lanky dinosaur that resembles an ostrich. They have duck-billed beak-like mouths with a bird-like head and a long neck. They also have small clawed front hands, long hind legs, and a long tail.
A few Ornithomimus appears briefly in The Rite of Spring segment of Fantasia. They are first seen marching through a marsh and stopping for a drink of water. Some of them noticed the arrival of the Tyrannosaurus Rex, and others, including a mother and her babies, are shown running away from the fight between the T. rex and the Stegosaurus.
- Ornithomimus was found to be feathered like ostriches. Large feathers much like those on an ostrich have been found on the arms and body. The legs were covered in bare skin from mid-thigh down to the feet.
- Ornithomimus is thought to have been an herbivore based on gastroliths (stomach stones) found within and alongside skeletons.