The Nicobar long-tailed macaque is a species of monkeys endemic to three islands of the Andaman and Nicobar archipelago. Found in troops that consist of an alpha male and female, there is a system of hierarchy, as is seen in all group living animals. While adults are further categorised as beta individuals and subordinates, juveniles and infants also form a part of the troop. In many social animals, like the macaques, the ranking of an individual determines the role they play on other activities within the group. In a recent study, researchers have investigated if an individual’s rank has any effect on how the members groom each other.