Breeds north-eastern Argentina (Misiones, Corrientes, Entre Ríos and north-eastern Buenos Aires), south-eastern Brazil (southern Sío Paulo, Santa Catarina, Rio Grande do Sul) and north, eastern and western Uruguay; in austral winter, some move northern as far Mato Grosso do Sul (southern Brazil).
 
Population
Estimated population is unknown (2010).
Glaucous-blue Grosbeak (Cyanoloxia glaucocaerulea) [XC493553]
by Fernando Jacobs from Botucatu, S\u00e3o Paulo, Brazil (call)
Glaucous-blue Grosbeak (Cyanoloxia glaucocaerulea) [XC341000]
by Victor Antonelli from Salto, Departamento de Salto, Uruguay (song)
Subspecies
No subspecies.
Genus sometimes subsumed in Passerina. Apparent hybrids between this species and an unspecified Oryzoborus seed-finch (Emberizidae) reported from Brazil.