It takes a village
For the first 2 weeks of the infant's life the mother carries the young, during the third week the father carries the infant, then in the fourth week the responsibility for carrying the young, then in the fourth week, responsibility for carrying young is taken up by all of the Goeldi monkeys in that group.
They communicate using scent, facial and body language and vocalisations. They can make up to 40 different vocalisations which vary with the situation e.g. some are alarm calls, warning calls, long and short distance location calls. The location calls help them maintain contact with other individuals in the group.
They can rest in dense groups for between 30-90 minutes three times a day. During the resting periods, they may sunbathe or groom.