Orangutan diet: lessons from and for the wild

In this thesis, I examine several aspects and determinants of orangutan diet at individual and species levels. Up to now, most orangutan studies on diet have focused on broad diet categories at the population level. As such, this study presents results at a new level of detail, which is a necessary step to better understand orangutan behavior and predict how (reintroduced) orangutans can survive and adapt to habitat changes (and to their release in unfamiliar forest). I started this study in 2007 on the island of Sumatra, with this thesis containing the main findings of 2.5 years of field and experimental work.