A large, long-tailed nightjar from Sumba and Flores. Shows bold white patches in tail and wings in flight. Head pattern striking, with rufous cheeks and an obvious pale moustache. Inhabits forest edge, scrubland, and mangroves, principally in the lowlands, but sometimes in foothills too. Larger and longer-tailed than Savanna Nightjar, with tail extending clearly beyond wingtips when perched. Also note more strikingly-marked head and conspicuous, broad white outer tail tips. Gives an explosive burry “chow-chow” call.