South-eastern Brazil (Goiás and Minas Gerais south to Rio Grande do Sul), central and eastern Paraguay, northern and eastern Argentina (Chaco and Misiones south to north-eastern Chubut) and Uruguay.
 
Population
Estimated population is unknown (2010).
Firewood-gatherer (Anumbius annumbi) [XC277556]
by Jeremy Minns from Barra do Quara\u00ed, Brazil (song)
Firewood-gatherer (Anumbius annumbi) [XC400734]
by Robson Silva e Silva from Sitio Arqueol\u00f3gico Arroyo Seco, Tres Arroyos, Buenos Aires, Argentina (song)
Subspecies
No obvious close relatives. Proposed subspecies machrisi, described from Goiás (Brazil), has been shown not to be diagnosable.