deinocheirus

Deinocheirus mirificus was a massive, 11-meter (36-foot) long, 6-9 ton omnivorous ornithomimosaur that lived in Mongolia during the Late Cretaceous, about 70 million years ago. Known as the “terrible hand,” it featured 2.4-meter arms with large claws, a humpbacked sail, a duck-like bill, and lived in shallow, swampy environments.

Key Facts About Deinocheirus

• Discovery and Name: The name Deinocheirus means “terrible hand” in Greek, named in 1970 after its enormous 8-foot arms and 20-centimetre claws were found.
• Size and Structure: It was one of the largest ornithomimosaurs, rivaling the size of Tyrannosaurus rex. It had a unique body with a hunchback sail, a duck-like snout, and a tail with a fan of feathers.
• Diet: While classified as a theropod, Deinocheirus was an omnivore. It likely used its huge claws to forage for plants, but it also ate fish, as evidenced by fossilized fish scales found in its stomach region.
• Habitat and Behavior: It lived in the Nemegt Formation of Mongolia in a swampy, river-dense environment. It was a slow-moving, heavy creature that likely preferred wading in shallow water to avoid predators like Tarbosaurus.
• Unusual Features: Unlike its fast-moving, smaller relatives, Deinocheirus was heavily built. It had a small brain, short, stout legs, and a wide, flat beak for eating plants and aquatic food.