Proboscis Monkeys have a very special diet. They mainly eat fruits such as figs, durians, and mangosteens.
They also enjoy leaves, flowers, and seeds. In addition, they feed on termites and small crustaceans. They rarely consume insects or other animals.
Proboscis Monkeys are also known to often seek out Gilimanuk fruits (a type of banana), mushrooms, and algae when available.