Ornithomimus (OR nith oh MY mus) was a speedy runner. Its name means "bird mimic." Its body looked very much like an ostrich. It had a small head and a long neck. It had long, slender back legs and a toothless beak. It had a long, stiff tail. It walked on its two back legs. Its hands had three fingers with long, slender claws. Scientists think that it was an omnivore, eating plants, insects, and small animals. It had hollow bones, like today's birds. It could .....