Purus red howler

The Purus red howler, Alouatta puruensis, is a species of howler monkey in the New World monkey family Atelidae. It is native to Brazil, Peru and the north of Bolivia, and it is an arboreal mammal, living in the trees of South America. The species was described in 1941 by Einar Lönnberg, and it was earlier treated as a subspecies, Alouatta seniculus puruensis, of the red howler. Its diet is leaves, which places it among the leaf-eating primates. The IUCN Red List, in its 2021 assessment, lists the Purus red howler as vulnerable, so its populations are considered to face a high risk of decline.