Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela.
Amazon Basin from eastern Ecuador and south-eastern Colombia east to southern Venezuela, the Guianas and northern Brazil (east to Belém), and south to north-eastern Peru and northern Mato Grosso.
 
Population
Estimated population is unknown (2010).
Collared Puffbird (Bucco capensis) [XC155448]
by Jerome Fischer from Cristalino Jungle Lodge, MT, Brazil (song)
Collared Puffbird (Bucco capensis) [XC219838]
by John V. Moore from Amazon Manu Lodge, Madre de Dios, Peru (song)
Subspecies
Birds from south-eastern Colombia to Ecuador and eastern Peru sometimes treated as subspecies dugandi, but this form is doubtfully distinct.