Rio Grande do Sul, Brazil.
See T. argentea, also T. peruviana. Species has sometimes been referred to as T. castanonota, but present name has priority. An aviary specimen, originally described as T. arnaulti, is now believed to be a hybrid between present species and T. cayana. Monotypic.
SE Paraguay, NE Argentina (Misiones S to Entre Ríos, and at least formerly to mouth of R La Plata and N Buenos Aires), coastal SE Brazil (São Paulo S to Rio Grande do Sul) and Uruguay.
Food and feeding
Status and conservation
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