The White-rumped Swallow is a South American swallow with glossy blue-green upperparts and a white rump and belly. It catches insects over water and grassland and also nests in building cavities.
The forehead and crown have a blue-green gloss, with a white line above the eye and white rump and underparts. The sexes look alike.
It nests near lakes, marshes, and other water, and catches insects over water, pasture, and open areas in woodland. It uses both natural cavities and gaps in buildings for nesting.
An extinction-risk assessment has not been added yet.