The jaws of "Avimimus" were thought to form a parrot-like beak lacking teeth, and a thorough review of the holotype specimen's anatomy confirmed that no teeth were preserved, although a series of tooth-like projections along the tip of the premaxilla were. However, subsequently discovered specimens have been reported to preserve small premaxillary teeth. The small teeth or possible lack thereof in "Avimimus" suggests that it may have been an herbivore or omnivore. Kurzanov himself, however, believed that "Avimimus" was an insectivore.