The Tumbes Swallow has glossy blue upperparts, a white rump and belly, and a squared tail. It is uncommon within its restricted range in north-western Peru and also occurs in Ecuador, foraging close to the ground.
Its upperparts are glossy blue, with a white rump and white line in front of the eye. The underparts are white and the tail is squared.
It forages over a variety of habitats, generally close to the ground.
An extinction-risk assessment has not been added yet.