A bird's wing shape affects whether it glides, soars, or flaps constantly.

The longer version

A wing's aspect ratio and loading decide how it flies. Long narrow wings with a high aspect ratio produce lift with little drag and suit gliding and soaring over water. Short rounded wings with slots between the outer feathers give fast acceleration and tight turning in woodland. Broad wings with separated tips suit thermal soaring.

The same wing changes shape with wear and season, and tip spread matters, since splayed fingers reduce the swirl at the tip that wastes energy. Ocean-crossing migrants tend toward long pointed wings; residents in dense cover tend toward rounded ones. Wing shape is one of the first things a field guide uses, because ecology follows from it.

Where this entry sits

Here you will find feathered trivia about flight, migration, nests, eggs, and the songs birds sing. Expect short surprising facts on penguins, owls, hummingbirds, and other familiar birds from gardens, forests, wetlands, and distant coastlines. The full list sits on the Birds page, where every entry is listed in order.