Swifts have very short legs that allow them to perch on vertical surfaces.
You will almost never see a swift perched horizontally. Their scientific
family name means "without feet".
Dark gray upperparts. Whitish throat. Pale gray breast, rump and underwings. Long, stiff, crescent-shaped wings. Short, squared off tail. Small black bill. Juvenile similar to adult. Sexes similar. 4.5 inches in length.
Forests, woodlands, lakes, and towns.
3-5 white eggs with brown spots. The eggs have a 18-20 day incubation period. Fledging occurs in 28 days. The nest is bunch of small sticks glued together with saliva. It is usually built on the inside of a hollow tree.