Eastern Red-rumped Swallow

The eastern red-rumped swallow is 19 centimetres long with a deeply forked tail. It has blue upperparts apart from a reddish collar, sometimes absent, and a streaked chestnut rump. The face and underparts are white with heavy dark streaking. The sexes are alike, but juveniles are duller and browner, with a paler rump and shorter outer tail feathers. The population in mainland India, erythropygia, has a uniform dark chestnut rump patch without dark shaft-streaks, a shallow tail fork and an indistinct white patch on the inner web of the outer tail feathers. (Wikipedia, general species account)

This small swallow is found in open, often hilly areas with clearings and cultivation across eastern and southeastern Asia to northeastern India and Taiwan. The European red-rumped swallow and the African red-rumped swallow were formerly considered subspecies of this species. (Wikipedia, general species account)