Aotus azarae is found only in South America. It inhabits the area south from the Rio Madre de Rios and Rio Guapore in Bolivia into Paraguay and northern Argentina. In Argentina, the southern night owl ranges south of the Rio Bermejo and east from the Rio Paraguai to the Andes. This species is divided into two subspecies, Aotus azarae boliviensis and Aotus azarae azarae, by an area extending roughly from Lago Uberaba on the east to Sucre, Bolivia, on the west. Aotus a. boliviensis is the northern subspecies; A. a. azarae, the southern one. Baer (1994), Nowak (1991)

 

Biogeographic Regions: Neotropical; Neotropical :: Native