Rikbaktsa society is divided into exogamous moieties, which are associated with the yellow macaw and the arara cabeçuda —a kind of scarlet macaw—and subdivided into various clans that are associated with animals and plants. In the past the clans were more numerous and had associated body painting, ornaments, and special activities. Nowadays these associations are found only among moieties and apparently no longer exist among clans. Descent and filiation are patrilineal. Kinship terminology is similar to that of the Iroquois system.