A chunky, large-headed bird of open areas, usually found perched on wires or flying around in search of insects. Soft gunmetal gray with white underparts. Often found pressed together in pairs or tight groups when at rest. Sometimes flies in the same areas as swallows and swifts, but has a much thicker build, with triangular, somewhat starling-like wings. The only woodswallow throughout most of its range. Song is a somewhat myna-like series of sweet warbling and harsh chattering. Also gives nasal scolding “nyeh”, comparable to a jay or treepie.