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The Bornean orangutan (''Pongo pygmaeus'') is a species of orangutan native to the island of Borneo. Together with the Sumatran orangutan, it belongs to the only genus of great apes native to Asia. Like the other great apes, orangutans are highly intelligent, displaying advanced tool use and distinct cultural patterns in the wild. Orangutans share approximately 97% of their DNA with humans.〔(【引用サイトリンク】 Orangutan Facts )〕 The Bornean orangutan is an endangered species, with deforestation, palm oil plantations and hunting posing a serious threat to its continued existence. == Taxonomy == The Bornean orangutan and the Sumatran orangutan diverged about 400,000 years ago, with a continued low level of gene flow between them since then.〔 The two orangutan species were considered merely subspecies until 1996; they were elevated to species following sequencing of their mitochondrial DNA. The Bornean orangutan has three subspecies:〔 *Northwest Bornean orangutan ''P. p. pygmaeus'' – Sarawak (Malaysia) & northern West Kalimantan (Indonesia) *Central Bornean orangutan ''P. p. wurmbii'' – Southern West Kalimantan & Central Kalimantan (Indonesia) *Northeast Bornean orangutan ''P. p. morio'' – East Kalimantan (Indonesia) & Sabah (Malaysia) There is some uncertainty about this, however. The population currently listed as ''P. p. wurmbii'' may be closer to the Sumatran orangutan (''P. abelii'') than to the Bornean orangutan. If this is confirmed, ''P. abelii'' would be a subspecies of ''P. wurmbii'' (Tiedeman, 1808). In addition, the type locality of ''P. pygmaeus'' has not been established beyond doubt; it may be from the population currently listed as ''P. wurmbii'' (in which case ''P. wurmbii'' would be a junior synonym of ''P. pygmaeus'', while one of the names currently considered a junior synonym of ''P. pygmaeus'' would take precedence for the taxon in Sarawak and northern West Kalimantan).〔 Bradon-Jones ''et al'' considered ''P. morio'' to be a synonym of ''P. pygmaeus'', and the population found in East Kalimantan and Sabah to be a potentially unnamed separate taxon.〔 In early October 2014, researchers from domestic and foreign countries found about 50 orangutans separate in several groups in South Kalimantan Province, although previously there are no record that the province has orangutan.〔(【引用サイトリンク】title=Ternyata di Kalsel Ada Populasi Orangutan )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Bornean orangutan」の詳細全文を読む スポンサード リンク
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