Least Nighthawk Chordeiles pusillus

  • Order: Caprimulgiformes
  • Family: Caprimulgidae
  • Polytypic: 6 subspecies
  • Authors: Dominique Hellmich
Sections

Distribution

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  • Year-round
  • Migration
  • Breeding
  • Non-Breeding
Distribution of the Least Nighthawk
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eBird range map for Least Nighthawk

Generated from eBird observations (Year-Round, 1900-present)

Distribution in the Americas

Least Nighthawk is widespread across eastern South America. This species appears to be most common in two disjunct regions: in southern Venezuela, Guyana and north central Brazil, and also in the cerrados of south central Brazil. The distribution also extends west, in the north, to eastern Colombia; there are smaller populations across central Brazil; and in the south, Least Nighthawk also occurs in eastern Bolivia and northeastern Argentina.

Many populations of Least Nighthawk are thought to be sedentary, although the movement patterns for the species as a whole are poorly known. Friedmann (1948) suggested that it might be migratory in the Río Negro region of Venezuela (subspecies esmeraldae); during one visit to the region Least Nighthawk was encountered "in any number" on only two days, leading Friedmann to wonder "if the species may be migratory, and whether the meeting with it was due to a sudden flight". Other explanations are possible, of course, including local movements, rather than long distance migrations. Dickerman (1988) suggested that migration might account for a record of the northern subspecies septentrionalis from Acre, west central Brazil. Sick (1997) described Least Nighthawk as migratory in central and southern Brazil, although without describing its movements in any detail. Kirwan et al. (2004) also noted that this species occurs in São Paulo and Minas Gerais, Brazil, "on a distinctly seasonal basis".

Distribution outside the Americas

Endemic to the Americas.

Habitat

Least Nighthawk occurs at low elevations, up to 900-1000 m (Parker et al. 1996, Cleere 1998). This nighthawk usually inhabits open savanna or subtropical and seasonally wet or flooded grassland with scattered trees and scrub (both cerrado and caatinga) (Hilty and Brown 1986, Cleere 1998, Hilty 2003). May also be found in clearings along forest edges where savanna and scrubland have become established (Cleere 1998).

Historical changes

None reported.

Fossil history

None reported.

Recommended Citation

Hellmich, D. (2014). Least Nighthawk (Chordeiles pusillus), version 1.0. In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/nb.leanig1.01