This martin has blue-black upperparts with a contrasting white rump, and white underparts. It resembles its close relatives, the Asian house martin and common house martin, but unlike those species it has a black throat and black undertail.
This martin is characterized by its blue-black upperparts with a contrasting white rump, and white underparts. Like other house martins, it has distinct markings, but unlike them, it features a black throat and undertail.