Sand-coloured nighthawk

The sand-coloured nighthawk, Chordeiles rupestris, is a nightjar of the family Caprimulgidae that lives along the rivers of the western Amazon basin in Bolivia, Brazil, Colombia, Ecuador, Peru and Venezuela. It is 20.5 to 22 cm long, with pale grayish brown upperparts marked with darker streaks, bars and spots, a white to buffy white chin and throat, and a mostly white underside to the wing. Two subspecies are recognised by the major taxonomic systems, though at least two authors treat the species as monotypic. It is crepuscular and nocturnal, roosting by day on river islands and sandbars, often in large numbers, and hunting very actively at dusk and then on and off through the night; its diet is known to be entirely insects. It nests in loose colonies on sandbars, laying two eggs in a scrape, often near terns and skimmers. The IUCN rates it Least Concern because of its very large range, although the population is believed to be declining.