Breeds central Chile (Santiago south to Valdivia), northern and eastern Argentina (south to Chubut and Buenos Aires), Uruguay and south-eastern Brazil (Rio Grande do Sul); in non-breeding season north to Paraguay.
 
Population
Estimated population is unknown (2012) and decreasing.
Warbling Doradito (Pseudocolopteryx flaviventris) [XC754876]
by Guillermo Treboux from Ca\u00f1ada de las Ovejas, Col\u00f3n, Entre R\u00edos, Argentina (song)
Warbling Doradito (Pseudocolopteryx flaviventris) [XC50871]
by Miguel Castelino from Otamendi, Campana, Buenos Aires, Argentina (call)
Subspecies
Pseudocolopteryx flaviventris (Sibley and Monroe 1990, 1993) has been split into Pseudocolopteryx flaviventris and Pseudocolopteryx citreola following SACC (2010).
Chilean birds may be slightly larger in size than those elsewhere in range. Further study is needed.