Anguilla, Antigua And Barbuda, Argentina, Barbados, Bolivia, Brazil, Colombia, Costa Rica, Dominica, Ecuador, French Guiana, Grenada, Guadeloupe, Guyana, Martinique, Montserrat, Nicaragua, Panama, Paraguay, Peru, St Kitts And Nevis, St Lucia, St Vincent and The Grenadines, Suriname, Trinidad and Tobago, Venezuela.
Population
Estimated population is unknown (2010).
Grey-rumped Swift (Chaetura cinereiventris) [XC550074]
by Bernabe Lopez-Lanus from Forestal Belga (Cruce Caballero), San Pedro, Misiones, Argentina (song)
Grey-rumped Swift (Chaetura cinereiventris) [XC295760]
by Fernando Igor de Godoy from Monte Alegre, Tel\u00eamaco Borba, Paran\u00e1, Brazil (flight call)
Subspecies
Sometimes considered conspecific with Pale-rumped Swift (Chaetura egregia), and these two form superspecies with Lesser Antillean Swift (Chaetura martinica). All subspecies but nominate have been grouped together in what might be incipient species, Chaetura sclateri.
The following 7 subspecies are recognised:
phaeopygos Hellmayr, 1906 - Eastern Nicaragua to Panama.
occidentalis von Berlepsch & Taczanowski, 1884 - Western Colombia, western Ecuador and extreme north-western Peru.
schistacea Todd, 1937 - Eastern Colombia to western Venezuela.
lawrencei Ridgway, 1893 - Northern Venezuela and southern Caribbean Is.
guianensis Hartert, 1892 - Eastern Venezuela and western Guyana.
sclateri Pelzeln, 1868 - Southern Venezuela through southern Colombia, north-western Brazil (upper Amazonia) and eastern Peru to north-western Bolivia.
cinereiventris Sclater, 1862 - Eastern Brazil, Paraguay and north-eastern Argentina (Misiones).
BirdLife International Species Factsheet