Fig. 5. Fruit availability (above) and average energetic intake (below) of four lactating wild Bornean orangutan females over 7 years.

Data are from the Tuanan Orangutan Research Area, Central Kalimantan, Indonesia [detailed by Vogel et al. (22, 51)]. Top: The percentage of fruiting trees derives from 1868 marked trees in monthly monitored phenology plots, 98% of which are species consumed by orangutans. Bottom: Mean daily caloric intake for four adult mother orangutans with nursing offspring (ranging from 0 to 6 years in age) collected from 2003 to 2010. Data are based on 12,669 hours from 1100 full-day focal animal follows.