According to MonkeyWorlds, all monkeys share some behavioral traits regardless of species. Showing emotion through non-verbal communication, grooming and social hierarchies are several behaviors that do not vary much between species.
MonkeyWorlds goes on to explain that non-verbal communication is one of the most important behaviors known to monkeys. Like human mothers, mother monkeys cuddle with their babies to protect them and help them feel loved. Adult and baby monkeys use facial expressions to display their feelings to one another. When non-verbal communication is not a possibility, monkeys vocalize to express themselves or warn other monkeys about impending danger.
Monkey social structure is complex whether there are just a few individuals in the family or hundreds, according to MonkeyWorlds. In large families, there are often smaller groups of friends. Monkeys that are not content with their social status often leave their small groups to join others within the same family.
The Chronicle explains that monkeys often look for ways to strengthen their friendships, such as social participating in social grooming. MonkeyWorlds.com states that monkeys often spend hours gently picking debris and bugs out of each other's fur. Social grooming improves the family's health and leads to tighter bonds between individuals.