These monkeys spread urine on their hands and feet to leave a scent trail whilst moving about in the trees.
The squirrel monkey makes a ’chuck-chuck’ sound when it is feeding, to indicate its position to other members of its group.
The squirrel monkey is highly intelligent, and is known to have the largest brain to body mass ratio of all the monkey species.
The squirrel monkey uses a number of vocal calls to communicate with the rest of the troop. It has special warning sounds which indicate the presence of danger.