and dense, which makes it possible for an individual with the greatest capability of winning a fight, if one were to occur, to monopolize access to any patch. Within-group competition among common squirrel monkey groups is extremely high, and between-group competition is moderate to high. Coalition formation is not as stable as would be expected among the females of the group because considering their small and dense feeding patches, common squirrel monkey females with the greatest capability of winning a fight would benefit more if they were to form alliances to gain control of a patch and then not share the patch once in control of it. Once sexually mature, all males emigrate from their natal groups. After leaving, they may either become solitary, a peripheral of another troop, join another mixed-sex troop, or attend a tolerant troop of another monkey species. If they become a peripheral of another group, the male squirrel monkey chooses one troop and keeps a certain distance away from them while still trying to follow them. These males are the less dominant ones. A few male squirrel monkeys have been observed interacting with groups of other monkey species. Some females may leave their natal groups, as well, although they tend to be more philopatric. If females do leave their natal groups, they do it after becoming sexually mature. Often, they migrate before or right after a mating season. Due to this, they might end up leaving their group when they are pregnant or with their immature offspring. Males are typically dominant to females, but females still have a high status in the group. and are capable of forming coalitions against dominant males. Rarely do males form coalitions even if a group of males keeps their distance from the main group or are solitary. Several theories suggest that one of the reasons that male squirrel monkeys do not form coalitions is because of the lack of kinship due to emigration. Coalitions may also increase mortality risks within the group since males tend to be aggressive to each other. Genital display among males is an important social signal in relation to group hierarchy; it is derived from sexual behavior, but is used for social communication. It involves the animal spreading his thighs and having an erect penis. Dominant males display to submissive males to emphasize their higher status. The dominant males direct their action to the face