Warning and Aggression
The capuchin monkey will wipe urine on its hands and feet, to mark its scent on tree branches. This leaves a clear message for other capuchins, communicating that the territory has been claimed and intruders are not welcome. A group of capuchins will chase away intruders to protect their territory.
Grooming
Grooming is an important social behavior for capuchin monkeys as it is used to reinforce bonds between members of the group. Alpha males and females will groom and be groomed more often than the animals at the bottom of the hierarchy, according to Primate Info Net. This is because the alpha monkeys have a higher social standing.
Mating
When a female capuchin is in season, it will communicate this to a male through its behavior to show that it wants to mate. The female will give a mating call that sounds similar to a whistle. The animal will also become skittish, display a grimaced facial expression and follow the male around constantly, according to Primate Info Net.
Play
The capuchin monkey will give off a number of particular signals to show when it is in a playful mood. These include facial expressions, such as holding the mouth in a relaxed manner or holding the mouth open silently. Lip smacking is done to reassure other capuchins. These expressions show that the animal means no harm and they are often displayed during a friendly greeting. The capuchin will also wag its tail to show excitement during play.