South-eastern Brazil (north to Minas Gerais and Espírito Santo), Uruguay and north-eastern Argentina (Misiones south to Buenos Aires); southern populations winter north to south-central Brazil (southern Mato Grosso) and eastern Paraguay.
 
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).
Blue-billed Black Tyrant (Knipolegus cyanirostris) [XC835362]
by Bernabe Lopez-Lanus from Bocaina de Minas, Minas Gerais, Brazil (song)
Blue-billed Black Tyrant (Knipolegus cyanirostris) [XC544447]
by Lia Nahomi Kajiki from Parque Estadual de Campos do Jord\u00e3o, Campos do Jord\u00e3o, S\u00e3o Paulo, Brazil (call)