Black capuchin

The black capuchin (Sapajus nigritus), also known as the black-horned capuchin, is a capuchin monkey from the Atlantic Forest in south-eastern Brazil and far north-eastern Argentina. Historically it was included as a subspecies of the tufted capuchin. It is arboreal, mainly dwelling in the tree canopy, but it drops to the forest floor to forage where insects and nuts are most abundant. Groups usually have 6 to 20 members and are hierarchical, and group size follows food availability. Its population is unknown but thought to be declining because of habitat loss, hunting and the pet trade, and the IUCN rates the two southern subspecies Near Threatened and the distinctive northern subspecies Endangered.