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 FERNANDO G. BAPTISTA, MATTHEW W. CHWASTYK, AND RYAN WILLIAMS, NGM STAFF; MANYUN ZOU SOURCES: TIM LAMAN; CHERYL D. KNOTT, BOSTON UNIVERSITY; CAREL P. VAN SCHAIK, UNIVERSITY OF ZURICH; SERGE WICH, LIVERPOOL JOHN MOORES UNIVERSITY; MEREDITH BASTIAN, SMITHSONIAN NATIONAL ZOO UMBRELLA MAKING Orangutans make umbrel- las to shelter from the rain, holding leaves over their heads and sometimes their backs. Nest size around 4 ft Neesia Hairs Seeds Female Juvenile SNAG CRASHING Male orangutans push tree snags over to make noise as part of a display of dominant behavior. “KISS SQUEAKING” Orangutans make a sound known as a kiss squeak to threaten other orangutans and humans. Variation Some ride the snag as it falls, grabbing onto vegetation before the snag hits the ground. 45 567 Variation Some kiss-squeak into a handful of leaves, then toss them on the ground. 34 15 678 7 NEESIA FEEDING In the rain forests where Neesia is found, orangutans use their hands and teeth to break open these fruits and eat their fat-rich seeds. 45 349 12 Variation Some use sticks to extract the seeds and avoid the fiberglass-like hairs. 23 1 9 Variation Some use leaves as pillows, linings, covers, and possibly even mosquito repellent. all sites NESTBUILDING Each day the apes make fresh nests for sleep or day rest by breaking and weaving together branches to build a sturdy structure.