 C. a. foetens, named by Martin Lichtenstein in 1817, is known as the Andean black vulture. It is approximately the same size as C. a. atratus. The markings on the undersides of the primaries are smaller than those of the other subspecies, and the underwing coverts are darker. It is found in the Andes range, from northern Ecuador through Peru, northern Bolivia, Paraguay, Uruguay, and the lowlands of Chile.
