It is similar to that of common house martin, but more rasping. The bird is superficially similar to a large barn swallow or house martin. The barn swallow and house martin now rarely use natural sites. The Nepal house martin is resident in the mountains of southern Asia. House martin colonies can be destroyed in repeated visits. The adult Nepal house martin is long, mainly blue-black above and white below. The common house martin is a noisy species, especially at its breeding colonies. The common house martin has a large range, with an estimated global extent of . Non-breeding Asian house martin have been recorded as far west as the United Arab Emirates.