Black-horned 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. == Taxonomy == The black capuchin was originally named Cebus nigritus or Cebus apella nigritus. While this has changed, many sources still name the black capuchin as part of the genus Cebus. == Social behaviour == === Group size === The black capuchin is a social animal that prefers to live in groups, usually consisting of 6 to 20 members. These groups are hierarchical and, while they tend to be made up of more females than males, the alpha female of the group is submissive to the alpha male. Group size is a function of food availability; size and cohesiveness are highest when food is readily available. When food is scarce, black capuchins split up into smaller groups to cover more ground per capita. This is observed both seasonally in the short term and over the course of years in the long term. The larger the group, the more food they need, which in turn leads to more travel. Females are, for the…