Orangutans are great apes native to the rainforests of Indonesia and Malaysia.
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Orangutans are the most solitary of the great apes: social bonds occur primarily between mothers and their dependent offspring.
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Orangutans have been featured in literature and art since at least the 18th century, particularly in works that comment on human society.
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Orangutans reported that Malays had informed him the ape could talk, but preferred not to "lest he be compelled to labour".
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Orangutans is believed to have been describing gorillas, but in the 18th century, the terms orangutan and pongo were used for all great apes.
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Orangutans move through the trees by both vertical climbing and suspension.
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Orangutans are mainly arboreal and inhabit tropical rainforest, particularly lowland dipterocarp and old secondary forest.
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Orangutans occasionally enter grasslands, cultivated fields, gardens, young secondary forest, and shallow lakes.
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Orangutans are thought to be the sole fruit disperser for some plant species including the vine species Strychnos ignatii which contains the toxic alkaloid strychnine.
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Orangutans visit the sides of cliffs or earth depressions for their mineral licks.
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Orangutans build nests specialised for either day or night use.
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Orangutans are choosy about sites, though nest can be found in many tree species.
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Orangutans are the first nonhuman species documented to do so.
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Orangutans can learn to mimic new sounds by purposely controlling the vibrations of their vocal folds, a trait that led to speech in humans.
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Orangutans have been observed to use sticks to poke at catfish with sticks, causing then to leap out of the water so ape can grab them.
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Orangutans were known to the native people of Sumatra and Borneo for millennia.
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Orangutans first appeared in Western fiction in the 18th century and have been used to comment on human society.
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Orangutans are featured prominently in the 1963 science fiction novel Planet of the Apes by Pierre Boulle and the media franchise derived from it.
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Orangutans are typically portrayed as bureaucrats like Dr Zaius, the science minister.
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Orangutans are sometimes portrayed as antagonists, notably in the 1832 Walter Scott novel Count Robert of Paris and the 1841 Edgar Allan Poe short story The Murders in the Rue Morgue.
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Orangutans was occasionally taken on coach rides clothed in a smock-frock and hat and even given drinks at an inn where he behaved politely for the hosts.
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Orangutans is remembered for her meeting with Charles Darwin who compared her reactions to those of a human child.
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Orangutans was nicknamed "the hairy Houdini" and was the subject of a fan club, T-shirts, bumper stickers and a song titled The Ballad of Ken Allen.
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Orangutans that have lost their homes often raid agricultural areas and end up being killed by villagers.
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