Unenlagia

What it was like

Unenlagia was a feathered, two-legged predator about 2.4 meters (8 feet) long, related to the raptors. Its shoulders allowed it to raise and fold its arms somewhat like a bird's wings, which gave it its name.

Its world

It lived about 94 to 86 million years ago, in the Late Cretaceous, in what is now Argentina. Its bones come from the Portezuelo Formation, where it shared the land with the big predator Megaraptor and the giant titanosaur Futalognkosaurus.

How it was found

Novas and Puerta named Unenlagia in 1997. A second species was named later. Some scientists think the small Neuquenraptor from the same rocks may be the same animal.