Orangutan species great ape long arm reddish-brown hair Indonesia Malaysia rainforest Borneo Sumatra, Java Vietnam China Pongo P
Illustrated travels a record of discovery geography and adventure edited by h w bates assistant secretary of the royal geographical society with engravings from original drawings by celebrated artists cassell petter and & galpin London paris new york, Orangutans are the most arboreal of the great apes, spending nearly all of their time in the trees. Every night they fashion nests, in which they sleep, from branches and foliage. They are more solitary than the other apes, with males and females generally coming together only to mate. Mothers stay with their babies until the offspring reach an age of six or seven years. There is significant sexual dimorphism between females and males: females can grow to around 4 ft 2 in or 127 centimetres and weigh around 100 lbs or 45 kg, while flanged adult males can reach 5 ft 9 in or 175 centimetres in height and weigh over 260 lbs or 118 kg. The arms of an orangutan are twice as long as their legs. Much of the arm's length has to do with the length of the radius and the ulna rather than the humerus. Their fingers and toes are curved, allowing them to better grip onto branches. Orangutans have less restriction in the movements of their legs unlike humans and other primates, due to the lack of a hip joint ligament which keeps the femur held into the pelvis. Unlike gorillas and chimpanzees, orangutans are not true knuckle-walkers, and walk on the ground by shuffling on their palms with their fingers curved Orangutan (Pongo pygmaeus) Pongo pygmaeus pygmaeus - northwest populations Pongo pygmaeus morio - east populations Pongo pygmaeus wurmbii - southwest populations Sumatran Orangutan (P. abelii) The populations on the two islands were classified as subspecies until recently, when they were elevated to full specific level, and the three distinct populations on Borneo were elevated to subspecies. The population currently listed as P. p. wurmbii may be closer to the Sumatran Orangutan than the Bornean
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