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Black-and-white colobuses (or colobi) are Old World monkeys of the genus ''Colobus'', native to Africa. They are closely related to the brown colobus monkeys of genus ''Piliocolobus''.〔 The word "colobus" comes from Greek κολοβός ''kolobós'' ("docked"), and is so named because in this genus, the thumb is a stump. Colobuses are herbivorous, eating leaves, fruit, flowers, and twigs. Their habitats include primary and secondary forests, riverine forests, and wooded grasslands; they are found more in higher-density logged forests than in other primary forests. Their ruminant-like digestive systems have enabled these leaf-eaters to occupy niches that are inaccessible to other primates. Colobuses live in territorial groups of about nine individuals, based upon a single male with a number of females and their offspring. Newborn colobuses are completely white. Cases of allomothering are documented, which means members of the troop other than the infant's biological mother care for it. Colobuses are important for seed dispersal through their sloppy eating habits, as well as through their digestive systems. They are prey for many forest predators, and are threatened by hunting for the bushmeat trade, logging, and habitat destruction. There are five species of this monkey, with at least eight subspecies:〔 *Genus ''Colobus'' * *Black colobus, ''C. satanas'' * * *Gabon black colobus, ''C. s. anthracinus'' * * *Bioko black colobus, ''C. s. satanas'' * *Angola colobus, ''C. angolensis'' * * *Sclater’s Angola colobus, ''C. a. angolensis'' * * *Powell-Cotton’s Angola colobus, ''C. a. cottoni'' * * *Adolf Friedrichs’s Angola colobus, or Ruwenzori black-and-white colobus, ''C. a. ruwenzorii'' * * *Cordier’s Angola colobus, ''C. a. cordieri'' * * *Prigogine's Angola colobus, ''C. a. prigoginei'' * * *Peters's Angola colobus or Tanzanian black-and-white colobus, ''C. a. palliatus'' * *King colobus, ''C. polykomos'' * *Ursine colobus, ''C. vellerosus'' * *Mantled guereza or Abyssinian black-and-white colobus, ''C. guereza''〔Wolfheim, J. H. (1983). ''Primates Of The World: Distribution, Abundance And Conservation''. Routledge. ISBN 3-7186-0190-7.〕'' File:Trapped-1.JPG|Angolan black-and-white colobus (''Colobus angolensis'') seen in Tanzania. ==References== 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「Black-and-white colobus」の詳細全文を読む スポンサード リンク
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