The Red-necked Tanager is a beautiful tanager, with mainly bright grass green underparts; a brilliant scarlet-red chin that broadens over the cheeks, neck and nape; a dark blue crown and throat; and orange-yellow wing coverts. The Red-necked Tanager is restricted to eastern South America; it is almost endemic to eastern Brazil, but the distribution also extends to adjacent eastern Paraguay and northeastern Argentina. There are three subspecies of Red-necked Tanager, which differ primarily in the extent of the throat patch and in the details of the coloration of the head. There are disjunct populations in the highland forests of Ceará and in the lowland and foothill forests in Pernambuco and Alagoas; otherwise this species is more continuously distributed from southern Bahia and Espírito Santo south to Rio Grande do Sul, Paraguay and Argentina. Found in small groups of up to four or five individuals, the Red-necked Tanager regularly joins midstory and subcanopy mixed-species flocks, like other species of Tangara, and also visits bird tables to feed on fruit.