South-eastern Brazil from central Bahia (Chapada Diamantina) south to northern Rio Grande do Sul, also adjacent eastern Paraguay (Alto Paraná, Itapúa) and north-eastern Argentina (Misiones, north-eastern Corrientes).
 
Rarity Status
Currently this species is not classified as a rarity in this country OR information has not been updated.
Population
Estimated population is unknown (2010).
Black-billed Scythebill (Campylorhamphus falcularius) [XC202013]
by Eric DeFonso from Caingu\u00e1s, Misiones Province, Argentina (song)
(Campylorhamphus falcularius) [XC431065]
by Luis Seko Pradier from Botucatu, S\u00e3o Paulo, Brazil (call)
Subspecies
No subspecies.
Sometimes thought to form a superspecies with Red-billed Scythebill (Campylorhamphus trochilirostris). Regarded by some authors as conspecific, an arrangement disputed by most. Close relationship with Curve-billed Scythebill (Campylorhamphus procurvoides) is also suggested.