Siamangs are the largest of the gibbon species. Male and female siamangs are about the same size. High fiber biscuits are available at all times. Reproduction Siamangs mature sexually at 5 to 7 years of age. They form long-term monogamous bonds.
Females reproduce approximately every two to three years.
Life Cycle Siamangs provide a high level of parental care for their young. They will not grow their long, adult hair until 2 to 3 years old. During the first year, mothers closely guard and care for their infants. Young are weaned at about 1, at which time fathers take over their daily care until the juveniles can live without assistance at about age 3. Between 6 to 8 years old, subadult siamangs leave their family units to establish their own families.