Titi

12 months – Yearlings weigh ~1.3 kg .
12-14 months – Nutritional weaning is complete In captivity, nutritional weaning can occur as early as 8 months of age in cynomolgus macaques.
Artificial weaning (permanent separation of infants from their mothers) should not occur before 10-14 months of age [11]. Infants separated early from the mother show development abnormalities, including impaired cognition, altered physiology, disrupted endocrine response to stress, behavioural abnormalities and inability to function in a social group [12-16]. These effects can be life-long and impact negatively on the suitability of such animals as research models.
18 months – Juveniles usually remain close to their mother until the birth of a sibling ~1 – <2 years . Juveniles develop social skills, through sex-specific patterns of play. capuchin monkey