Дымчатый иглохвост Chaetura pelagica

The "flying cigar" with a blunt head, squared-off tail, and long, sickle-shaped wings. Body is dark gray with a slightly paler throat. Flies all day long with ridiculously fast, snappy wingbeats. Nests and roosts in chimneys. Often seen in small groups, twittering and cruising around town in search of insects. The only swift in the eastern U.S.