Orangutan

Orangutan , originally uploaded by Pappu | Photography Love  :: NIKON.

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Orang Utan
The orangutans are the two exclusively Asian species of extant great apes. Native to Indonesia and Malaysia, orangutans are currently found only in the rainforests of Borneo and Sumatra. Classified in the genus Pongo, orangutans were considered to be one species. However, since 1996, they were divided into two species: the Bornean orangutan (P. pygmaeus) and the Sumatran orangutan (P. abelii). In addition, the Bornean species is divided into three subspecies. The orangutans are also the only surviving species of the subfamily Ponginae, which also included several other species like Gigantopithecus, the largest known primate. Both species had their genomes sequenced and they appear to have diverged around 400,000 years ago. Orangutans diverged from the rest of the great apes approximately 15.7 to 19.3 mya (million years ago).

Orangutans are the most arboreal great apes and spend most of their time in trees. Their hair is typically reddish-brown, instead of the brown or black hair typical of chimpanzees and gorillas. Males and females differ in size and appearance. Dominant adult males have distinctive cheek pads and produce long calls that attract females and intimidate rivals. Younger males do not have these characteristics and resemble adult females. Orangutans are the most solitary of the great apes, with social bonds occurring primarily between mothers and their dependent offspring, who stay together for the first two years. Fruit is the most important component of an orangutan's diet, however, the apes will also eat vegetation, bark, honey, insects and even bird eggs. They can live over 30 years in both the wild and captivity.

Orangutans are among the most intelligent primates and use a variety of sophisticated tools, also constructing elaborate sleeping nests each night from branches and foliage. The apes have been extensively studied for their learning abilities. There may even be distinctive cultures within populations. Field studies of the apes were pioneered by primatologist Birutė Galdikas. Both orangutan species are considered to be Endangered with the Sumatran orangutan being Critically Endangered. Human activities have decimated the populations and ranges of both species. Threats to wild orangutan populations include poaching, habitat destruction and the illegal pet trade. There are several conservation and rehabilitation organisations dedicated to the survival of orangutans in the wild.

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