The common marmoset has its own set of vocalizations. Learning to recognize the individual sounds takes patience and a careful ear. Also a submissive call in adults. All thought to be involved with establishing and maintaining contact between animals within, and sometimes between, social groups. Smell is an important means of communication for all primates, including humans.
Marmosets have a better developed sense of smell than humans.
Communication by smell is called olfactory communication . The most common type of olfactory communication is scent marking . Scent marks identify an individual, its sex, species and many other attributes, including fertility status, or even if it recently had a fight. Scent marks by marmosets in the same social group may help to identify their group's territory. PLAY Play is a common and important behavior that occurs not only in primates, but in many other animal species as well.