The Forest Roamers...

Orangutan

Range: northern Sumatra and parts of BorneoHabitat: rain forest

Daydreamers
Orangutans are the loners and the daydreamers of the great apes. While chimps, bonobos, and gorillas are usually found in groups called troops—socializing, foraging, or playing—orangutans tend to be more solitary. It’s not that they don’t do all the things the other great apes do, it’s just that they seem to have a more internal approach to everything. While other apes might go from tree to tree searching for fruit, an orangutan will just sit in the forest canopy for hours on end until the location of the hidden fruit seems to mysteriously reveal itself. Then it will swing over for its meal. Orangutans have even been known to watch villagers use boats to cross the local waterways, and then untie a boat and ride it across the river on their own!
Relaxed problem solvers
Scientists like to explain the orangutan’s unique approach to problem solving with this example: If a chimp is given an oddly shaped peg and several different holes to try to put it in, the chimp will immediately try shoving the peg in various holes until it finds the hole that the peg fits in. But an orangutan will approach the challenge quite differently. It will stare off into space, or even scratch itself with the peg. Then, after a while, it will offhandedly stick the peg into the correct hole while looking at something else that has caught its interest!

Ken Allen, superstar
Orangutans are also known for their clever ability to get into places they’re not supposed to go! One of the San Diego Zoo’s most famous orangutans was Ken Allen, a Bornean orangutan Pongo pygmaeus pygmaeus known for his creative escape techniques. He would unscrew bolts with his fingers, reach around to unlatch things, climb up a steep incline by the back of his enclosure to slip over a wall, and so on.
Every time keepers figured out one of his escape routes, he would discover a new one. He never seemed to mind being led back into his enclosure—he just seemed to enjoy the challenge of finding a new way out! Ken Allen became a San Diego Zoo legend, with his own fan club and T-shirts, bumper stickers, and songs created in his honor. Many people were saddened when this gentle, mischievous ape developed cancer and passed away in December 2000.
Life with mom
In the wild, young orangutans usually stay with their mothers until they’re about eight years old or older. Orangutans have the longest childhood of the great apes because, when they grow up, they don’t have a troop around to give them more lessons. The solitary animals must learn all the lessons of finding fruit, building night nests, and other survival techniques before they set off on their own. Fruit trees are spread out over the rain forests where orangutans live, and they all flower and fruit at different times. So the youngsters learn a mental map of the forest layout and where ripe fruit is likely to be at any given time. They also learn to eat insects and birds’ eggs. At the San Diego Zoo the orangutans are offered cabbage, romaine lettuce, kale, carrots, yams, broccoli, bananas, apples, oranges, and grapes. Treats might include papaya, corn, turnip, onion, popcorn, raisins, peanut butter, and walnuts. The orangutan's motto is: food should never be boring!
Swinging through the treetops
Orangutans spend most of their lives in trees and travel by swinging from branch to branch with their long arms. They usually build a new nest every night, but occasionally reuse one. The apes also use leafy branches to shelter themselves from rain and sun, and sometimes they even drape large leaves over themselves like a poncho! Sometimes several mothers and their young encounter each other by a fruit tree within their overlapping ranges. They peacefully feed together and watch their youngsters play. Males, however, generally don’t care for company—especially from other males. If a male accidentally swings into a more dominant male’s territory, the dominant male gives a booming roar to scare him off. During mating season, the male orangutans’ calls also serve as an invitation to any females within hearing distance.

HELP ORANG UTAN
Unfortunately, these highly intelligent red apes are now extinct in much of Asia. Farming, logging, and the burning of the forest have destroyed 80 percent of the rain forests where orangutans used to make their homes. On top of that, poachers often kill orangutan mothers and sell their young in the illegal pet trade. In those cases, the orangutan orphan is usually doomed to a short and depressing life, unless it is rescued by an orangutan organization that takes care of orphans in special reserves. Many of these organizations have programs to educate loggers and local people about the need to protect their rare red neighbors and to help enforce the laws against poaching.
Great ape awareness
The San Diego Zoo is involved with some of these worthy organizations, including the Orangutan Foundation International. We are working to raise awaremess about the dangers all great apes face. In addition, the Zoo holds events to raise money to benefit these animals during our annual Great Ape Awareness Week and our 5K Walk on the Wild Side. Come out and support the apes!
Why does the orangutan need our help? Orangutans are one of the most critically endangered of the great apes, due to poaching and habitat loss. Based on the World Bankâ??s estimation that mechanized logging in the Kalimantan forest, (Indonesian Borneo), will result in its total loss by 2010, and other statistics stating that wild orangutans are disappearing at a rate of 5,000 orangutans per year, optimistic predictions give the orangutan ten more years before extinction in the wild.
A crisis exists for the orangutan
Never before has its very existence been threatened so severely. Economic crisis combined with natural disasters and human abuse of the forest are pushing our closest cousins to extinction. They have lost approximately 80% of their habitat in the last 20 years. We lost approximately 1/3 of the wild population of orangutans during the fires of ‘97-’98. There are approximately 40,000 to 50,000 orangutans remaining in Borneo (compared to about 60,000 in 1996) and approximately 4,000 to 6,000 left in Sumatra (compared to about 10,000 in 1996).
The threats to the survival of the orangutan are numerous and difficult to remedy.