Scissor-tailed Nightjar is a fairly common species distributed over much of eastern South America, from the central Amazon Basin south to central Argentina. The outer rectrices of the male are greatly elongated, and are almost twice as long as the body. In flight, the species is very distinctive, especially when the tail is spread. Although this species is widespread, many aspects of its biology are poorly known. Very few nests have been reported. Southern populations of Scissor-tailed Nightjar are thought to be migratory, but the migrations of this species are not well known. Probably these migrants winter in the southern Amazon Basin, but the seasonal occurrence of this species across is range is not well documented.