This swallow breeds across Europe and western Asia and winters south of the Sahara. It has blue-black upperparts, a white rump and underside, and a forked tail. It catches insects in flight and builds mud nests under eaves or on cliffs.
The upperparts have a blue-black sheen, while the rump and underside are white. The tail is shallowly forked and the feet are feathered white.
It catches small insects while flying. It builds mud nests under eaves or on cliffs, often in colonies. Birds that breed in Europe and western Asia migrate to spend winter in sub-Saharan Africa.
An extinction-risk assessment has not been added yet.