The Nacunda Nighthawk lives in open habitats in northern and eastern South America, catching insects in flight around dusk.
The underside is cream-white. A bright white V-shaped band marks the underside of the throat, and white wing bands are edged with black.
It catches flying insects over open fields and rivers in dim light, especially around dusk. It may roost on open ground during the day, where its plumage blends into the background. It is sometimes active during the day.
Argentine nests held two marked, pinkish-cream eggs laid directly on the ground. At one Villa María nest, the second egg hatched 18 days after it was laid.
Four stomachs examined around Villa María contained beetles, bugs and cicadas, moths, dragonflies and katydids.
Newly hatched Argentine chicks had half-open eyes and dense cream down, browner above. They began moving short distances at about two days old, later travelling several metres from the hatching site.
An extinction-risk assessment has not been added yet.