Abstract
Primolius auricollis (Yellow-collared Macaw, Psittaciformes, Psittacidae) is a monotypic species of the Arinae subfamily, with records in many South American countries. In Brazil, it occurs mainly on the Cerrado, but with two distinct populations: the northern one, bordering the Tocantins and Araguaia rivers, through the north of the states of Mato Grosso, Tocantins, Goiás, and Pará; and …