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"Ornithomimus, which means 'bird mimic'. And you can see why; exactly like an Ostrich."

Ornithomimus ("Bird Mimic") is a genus/species of herbivorous ornithomimud theropod dinosaur from the Late Cretaceous period Montana North America. Ornithomimus appear to be flock animals whose chicks have fluffy feathers and (like many modern day birds) imprint on the first thing they see. Herd-living prey for animals like Tyrannosaurus Rex, Ornithomimus was among the last of the dinosaurs.

A rare herbivorous theropod, they fed on both terrestrial vegetation and aquatic particles.



Ornithomimus lived during the Late Cretaceous period from 75-65 million years ago. It died out with other dinosaurs at the end of the Cretaceous. They were also prey items for Tyrannosaurus Rex and Dromaeosaurus.


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To the tip of its snout, Ornithomimus stood 8 feet tall, measured 15 feet long and weighed more than a grown man. These dinosaurs were vegetarians, but they would turn the beaks at the odd insect or a bit of meat, making them omnivorous dinosaurs, eating plants, meat, small reptiles and mammals, and even eggs. They were utterly the opposite of what anyone would imagine what dinosaurs to be like.

With their beaks at the front, they had ridges on the inside, much like modern ducks and geese, and Ornithomimus used those to crush their food. The beaks on these creatures allow then to sieve their food, making them more like ducks than ostriches. The males also looked different from the females, with the males having a blue body appearance and the females bodies being more grey in color.

In addition, Ornithomimus was a very fast dinosaur, capable of running at speeds as fast as 40 miles per hour, as fast as an Ostrich.


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Like many dinosaurs of their size and overall appearance, Ornithomimus often live in breeding herds or colonies of huge numbers as high as 13-20 numbers. In addition, whenever a female Ornithomimus was pregnant, that female would distance itself from the rest of the group of Ornithomimus. Female Ornithomimus were also very protective of their eggs.