As in other early birds, such as "Microraptor", "Anchiornis" had large wings, made up of flight feathers attached to the arm and hand (as in modern birds) as well as flight feathers on the hind legs, forming an arrangement of fore and hind wings. The forewing of "Anchiornis" was composed of 11 primary feathers and 10 secondary feathers. Unlike "Microraptor", the primary feathers in "Anchiornis" were about as long as the secondaries and formed a more rounded wing, with curved but symmetrical central vanes, a small and thin relative size, and rounded tips, all indicating poorer aerodynamic ability compared to its later relative. In "Microraptor" and "Archaeopteryx", the longest forewing feathers were closest to the tip of the wing, making the wings appear long, narrow, and pointed. However, in "Anchiornis", the longest wing feathers anchored near the wrist, making the wing broadest in the middle and tapering near the tip for a more rounded, less flight-adapted profile.