The Deinocheirus was a carnivorous dinosaur from the Upper Cretaceous period. It had a massive neck and the animal is believed to have been as large as the biggest Tyrannosaurus.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. The legs were relatively short, and bore blunt claws. The large claws may have been used for digging and gathering plants.