Gestation: 227-301 days
Birth
Infant (0-2.5 years)
Juvenile (2.5 - 7 years)
Adolescent (7-10 years)
Subadult Male (10-15 years)
Adult (Female: 8+ years; Males: 15 + years)
Benirschke, (2002)
Galdikas, (1981)
Galdikas, (1995)
Kaplan and Rogers, (1994)
Leighton, et al., (1995)
Nadler, (1988)
Wich et al. (2004)