What is archeornithomimus?

Archaeornithomimus is a genus of ornithomimid dinosaur that lived during the Late Cretaceous period in what is now Mongolia. Its name means "ancient bird mimic", and it is known only from a few partial skeletons. Archaeornithomimus was a bipedal dinosaur with long legs and a long, slender neck. It had a small head with a toothless beak and eyes set high on its skull. Archaeornithomimus was likely a fast runner and may have been an omnivore, eating plants and small animals. Its exact size and weight are uncertain, but it was probably about the size of a large ostrich. Like other ornithomimids, Archaeornithomimus had feathers, which are preserved in some fossil specimens.