This swift catches insects in flight and nests on cliffs beside waterfalls. A study in northeastern Argentina recorded breeding at several waterfalls.
In a nesting bird photographed in Misiones, the forehead appeared paler brown than the rest of the plumage.
It catches insects in the air. Fieldwork in northeastern Argentina recorded eight active nests on cliffs and similar rock faces reached by waterfall spray.
At Intervales State Park, Brazil, nests used mud, moss, roots, twigs and leaves, with fine dry roots lining the inside.
Nine egg-containing nests there each held one dull white egg; two adults took turns incubating at night.
Newly hatched chicks there were naked and pink, with grayish heads and backs, closed eyes and a white egg tooth.
An extinction-risk assessment has not been added yet.