Found from Patagonia north to southern Bolivia, with records in the austral winter as far north as southernmost Brazil and Uruguay, the Common Diuca-Finch is a distinctive species. The species most similar in appearance is the White-winged Diuca-Finch (Diuca speculifera), which is solely found in the high Andes, with scarcely any overlap in range. Molecular systematics have determined that the genus Diuca is not monophyletic, with each of these species falling within a different clade of tanagers (Burns et al. 2014). The Common Diuca-Finch is principally gray above, becoming blackish over the wings and tail, with a white throat, contrasting somewhat with the otherwise grayish underparts. It is a generally common constituent of the avifauna in shrublands and cultivated areas, and Patagonian deserts, and perches boldly atop low bushes. The common name for this species in Spanish is the Diuca Común and it was originally described by Molina in 1782 as Fringilla diuca (Jaramillo 2011). The name "diuca" comes from the Mapuche name for the bird.