Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, Venezuela.
Entire Amazon-Orinoco Basin, including south-eastern Colombia, southern and eastern Venezuela (north to north-eastern Monagas), the Guianas, north-eastern Ecuador, eastern Peru, northern Bolivia, and Amazonian Brazil.
 
Population
Estimated population is unknown (2010).
Rufous-tailed Flatbill (Ramphotrigon ruficauda) [XC655490]
by Jacob Wijpkema from road to Piso Firme, San Ignacio, Jos\u00e9 Miguel de Velasco, Santa Cruz Department, Bolivia (call, duet, song, subsong)
Rufous-tailed Flatbill (Ramphotrigon ruficauda) [XC395125]
by Caio Brito from BDFFP, Amazonas state, Brazil (song)
Subspecies
Present genus formerly believed to be allied to flatbills (Tolmomyias and Rhynchocyclus), but apparently belongs instead with Myiarchus and relatives, based on cranial, syringeal and nesting characters. Molecular data is still lacking. Formerly placed in genus Rhynchocyclus.