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The chacma baboon (''Papio ursinus''), also known as the Cape baboon, is, like all other baboons, from the Old World monkey family. It is one of the largest of all monkeys. Located primarily in southern Africa, the chacma baboon has a wide variety of social behaviors, including a dominance hierarchy, collective foraging, adoption of young by females, and friendship pairings. These behaviors form parts of a complex evolutionary ecology. In general the species is not threatened, but human population pressure has increased contact between humans and baboons. Hunting, accidents and trapping kill or remove many baboons from the wild. This has reduced baboon numbers and disrupted their social structure. == Taxonomy == Due to hybridization between different baboon (''Papio'') populations across Africa, authors have occasionally grouped the entire radiation as a single species, the hamadryas baboon, ''Papio hamadryas''. Arbitrary boundaries were then used to separate the populations into subspecies. Other authors considered the chacma baboon a subspecies of the yellow baboon, ''Papio cynocephalus'', though it is now recognised as a separate species, ''Papio ursinus''. The chacma baboon has two or three subspecies, depending on which classification is followed. Grubb et al. (2003) listed two subspecies, while Groves (2005) in Mammal Species of the World listed three.〔 This article follows Groves (2005) and describes three distinct subspecies. In the Grubb et al. (2003) paper, ''P. u. raucana'' was believed to be synonymous with ''P. u. ursinus''.〔 * ''Papio ursinus ursinus'' Kerr, 1792 – Cape chacma (found in southern South Africa) * ''P. u. griseipes'' Pocock, 1911 – Gray-footed chacma (found in northern South Africa to southern Zambia) * ''P. u. raucana'' Shortridge, 1942 – Ruacana chacma (found from Namibia to southern Angola) 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「Chacma baboon」の詳細全文を読む スポンサード リンク
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