The White-browed Woodswallow is a dark bird with a distinctive white eyebrow. The face and chin are black, the upperparts are deep blue grey and the lower breast to undertail is a rich chestnut brown. The underwings and undertail are pale whitish-grey, with white tail tips. Females are duller than males, with a browner body and pink to fawn underparts. Young birds are mainly brown, mottled and streaked buff to cream, and lack the white brow. This species is colonial and travels in large flocks that roost together in tight clusters.