An illustration of the dinosaur Anzu wyliei. The birdlike animal, about seven feet tall, weighed an estimated 500 pounds when it roamed western North America around 66-68 million years ago.
Nicknamed the "chicken from hell," the creature was formally introduced with an official name to the scientific community on March 19, 2014 as scientists published a description and analysis of its anatomy.
Credit: Mark Klingler/Carnegie Museum of Natural History/AP
A reconstructed skull of the dinosaur Anzu wyliei, March 18, 2014.
had a toothless beak and a crest on its skull like a rooster's comb,
combined with long arms and sharp claws up to about 4 inches long. It apparently also had feathers over much of its
Credit: Donald E. Hurlbert/Smithsonian Institution/AP
Tyler Lyson of the Smithsonian Institution's Department of Vertebrate Zoology, left, and Hans Sues of the Department of Paleobiology stand with a reconstructed skull of the dinosaur Anzu wyliei, March 18, 2014.
Credit: Brittany M. Hance/Smithsonian Institution/AP
An illustration shows the dinosaur Anzu wyliei, March 18, 2014 .
Credit: Bob Walters/AP
A reconstruction of the skeleton of the dinosaur Anzu wyliei., March 18, 2014.