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Orang-utans spend an average of one-third of their day foraging for food. They exhibit a bimodal feeding strategy, feeding most actively in the morning and late afternoon, and resting during the mid-day. Orang-utans prefer to eat fruits just before ripening, including the spiny-skinned, pulpy, aromatic durian. As much as 60% of all food eaten is fruit. Other items of the diet include young leaves, shoots, lianas, bark, flowers, wood pith, mineral-rich soil, and small amounts of ants, bees, honey, and wasp galls. Small foods, such as berries and leaf shoots, are picked with their lips or fingers. Large fruits are held in the hands while eating. Water is obtained from succulent vegetation and what can be collected from tree holes. They dip a hand in the water, and then drink droplets from the hairy wrist.

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Science EncyclopediaScience & Philosophy: Octadecanoate to OvenbirdsOrang-utan - Physical Characteristics And Habits, Diet, Communication, Behavior And Reproduction, Conservation Of Orang-utans