"Anchiornis" is notable for its long forelimbs, which were 80% of the total length of the hind limbs. This is similar to "Archaeopteryx"; long forelimbs are necessary for flight. "Anchiornis" also had a more avian wrist than other non-avialan theropods. The authors first thought that "Anchiornis" could fly or glide. However, further finds showed that the wings of "Anchiornis", while well-developed, were short when compared to later species like "Microraptor", with relatively short primary feathers that had rounded, symmetrical tips, unlike the pointed, aerodynamically proportioned feathers of "Microraptor". So the animal could glide, but probably not fly.