A new species of dinosaur, which has been dubbed "the chicken from hell" by US scientists, has been discovered.
The long legged Anzu wyliei was a 10ft tall bird-like dinosaur, weighed 500 pounds and had a bony crest on top of its head.
The dinosaur, which lived alongside the Tyrannosaurus rex 66 million years ago, also had feathers, sharp claws and a toothless beak. Experts believe it was an omnivore, eating both vegetation and small animals.
Dr Matt Lamanna, from the Carnegie Museum of Natural History in Pittsburgh, said: "We jokingly call this thing the 'chicken from hell,' and I think that's pretty appropriate."
The bones were found at sites in North and South Dakota in a rock formation known as Hell Creek, which has been a rich source of dinosaur fossils in the past, including those of the T. rex and Triceratops.
Although the remains were discovered years ago it took time for scientists to study them and their findings appear in the online journal Public Library of Science ONE.