Deinocheirus family portrait

Deinocheirus is a genus of large ornithomimosaur that lived during the Late Cretaceous around 70 million years ago, first discovered in the Nemegt Formation of Mongolia.
The largest specimen was estimated at 11 m (36 ft) long, and weighing 6.4 t (7.1 short tons).
Though it was a bulky animal, it had many hollow bones which saved weight.
The arms were among the largest of any bipedal dinosaur at 2.4 m (7.9 ft) long, with large, blunt claws on its three-fingered hands.

Illustration created for book project by Mike Kelly, "Super Predator: The World Of Tyrannosaurus rex".