National Geographic : 2016 Dec
1 2 3 8 4 9 5 6 7 Tuanan Ketambe Suaq Balimbing Kutai Batang Toru Gunung Palung Tanjung Puting Sabangau Kinabatangan Java Sea Celebes Sea South China Sea INDIANOCEA N SUMATRAJAV A BORNEO (KALIMANTAN) SULAWESI (CELEBES) SABAH INDONESIA MALAYSIA THAILAND MALAYSIA BRUNEI SINGAPORE Kuala Lumpur Jakarta EQUATOR 0mi 200 0km 200 Orangutan Range Bornean (Pongo pygmaeus) Sumatran (Pongo abelii) Sumatra Behavior observed at all sites Borneo Behavioral Study Sites ASIA AUSTRALIA Sumatra Borneo Among the Orangutans TERMITE FEEDING Orangutans eat ter- mites, from nests on the ground or in the forest canopy, by tapping the insects into their hands or sucking them out. Orangutans learn most of the behaviors illustrated here from their mothers before reaching adoles- cence around age 12. Some of the behaviors are ubiquitous. Others occur only in certain areas, suggesting there could be regional cultures. Male with facial flange Unflanged male Water LEAF WIPING Orangutans have been observed wiping their chins, eyes, and bodies with leaves. Sometimes this is to remove sticky residue left by food, but often the purpose is unclear. Variation Some use leafy twigs to get water from very deep tree holes. 12 Variation Some squeeze wet leaves like a sponge. 1 56 Variation Some bite the bottom of a pitcher plant and suck out rainwater. 237 56 34 8 7 145 56 THIRST QUENCHING Orangutans sometimes drink by dipping a hand into water and then dripping it into their mouths, but they get most hydration from food.