Buff-bellied Puffbird (Notharchus swainsoni) [XC299692]
by Fernando Igor de Godoy from Monte Alegre, Tel\u00eamaco Borba, Paran\u00e1, Brazil (call)
Buff-bellied Puffbird (Notharchus swainsoni) [XC404399]
by from Bolles-kue, RN Bosque Mbaracay\u00fa, Canindey\u00fa, Paraguay (call, song)
Subspecies
Notharchus macrorhynchos (Sibley and Monroe 1990, 1993) has been split into Guianan Puffbird (Notharchus macrorhynchos), Notharchus hyperrhynchus and Buff-bellied Puffbird (Notharchus swainsoni) following SACC (2005).
Forms a superspecies with Guianan Puffbird (Notharchus macrorhynchos), and usually regarded as conspecific.