wingcoverts

Wingcoverts are a group of feathers on a bird's wing that cover the bases of the flight feathers. They are located along the leading edge of the wing and the trailing edge of the wing. These feathers are typically shorter and less stiff than the flight feathers they cover, and they come in various shapes and sizes depending on the bird species.

The primary function of wingcoverts is to provide a smooth, aerodynamic surface to the wing, reducing drag and improving flight efficiency. They help to streamline the wing's profile, allowing air to flow more smoothly over the wing's surface. Additionally, wingcoverts can offer some protection to the flight feathers, preventing them from becoming damaged or frayed during flight or preening.

Wingcoverts are often used in bird identification as their coloration and patterns can be distinctive to a particular species. Birdwatchers and ornithologists examine the color, size, and arrangement of wingcoverts to help distinguish between similar-looking birds. For example, the lesser, median, and greater coverts are often differentiated by their position and appearance. Their patterns can also play a role in camouflage or in courtship displays.