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The white-eared titi (''Callicebus donacophilus''), also known as the Bolivian titi or Bolivian gray titi, is a species of titi, a type of New World monkey, from eastern Bolivia and an area of western Brazil. The species has a range that extends east from the Manique River in Beni Department, Bolivia to southern Rondônia in Brazil.〔 The southern end of its range includes forests around the city of Santa Cruz de la Sierra.〔 It is a medium-sized monkey with a grey back, orange underside and distinctive white ear tufts. It has an omnivorous diet, eating fruits, other plant materials and invertebrates. It is predated upon primarily by raptors, though felids and other monkey species have been known to attack the species. It is a monogamous species and lives in small groups of two to seven members consisting of the pair and their offspring. The family group has a home range of and the adults have a complex vocal repertoire to maintain their territory. It is also known for its characteristic twining of tails when groups are sitting together. White-eared titis can live for more than 25 years in captivity. The white-eared titi population has a declining trend. The decline is believed to be mainly caused by human-induced habitat loss and degradation. Despite this, the International Union for Conservation of Nature (IUCN) classified the species as ''Least Concern'' in 2008 as it has shown adaptability to habitat disturbance and is found over a wide range. == Taxonomy == The white-eared titi belongs to the New World monkey family Pitheciidae, which contains the titis (''Callicebus''), saki monkeys (''Pithecia''), bearded sakis (''Chiropotes''), and uakaris (''Cacajao''). It is a member of the subfamily Callicebinae, of which the only extant genus is ''Callicebus'', containing all of the titi monkeys. Although the exact position of species within the ''Callicebus'' genus is debated,〔〔 the white-eared titi has been placed within the subgenus ''Callicebus''〔 in the ''C. donacophilus'' group with the Rio Beni titi (''C. modestus''), Rio Mayo titi (''C. oenanthe''), Ollala Brothers' titi (''C. olallae''), and white-coated titi (''C. pallescens'').〔 The white-coated titi has sometimes been considered a subspecies of the white-eared titi, but they are treated as separate species in the latest edition of Mammal Species of the World.〔 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「White-eared titi」の詳細全文を読む スポンサード リンク
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