Late Jurassic to late Cretaceous
North America, Asia, Africa
The Infraorder Ornithomimosauria includes an advanced group
of active dinosaurs. They had small heads with no teeth, huge
eyes, and a long slim neck. The hind legs were long and thin, and
the arms were delicate. The tail was long and thin. They must
have looked very like featherless ostriches, and may have fed on
animals and plants.