Ornithomimidae ("bird-mimics") is a group of theropod dinosaurs which bore a superficial resemblance to modern ostriches. They were fast, omnivorous or herbivorous dinosaurs from the Upper Cretaceous of Laurasia (now Asia and North America). Members of the Ornithomimidae include "Gallimimus", "Archaeornithomimus", "Anserimimus", "Struthiomimus", and "Ornithomimus".