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The black duiker (''Cephalophus niger''), also known as ''tuba'' in Dyula, is a forest-dwelling duiker found in the southern parts of Sierra Leone, Liberia, Côte d'Ivoire, Ghana, Benin, and Nigeria. Black duikers stand around tall at the shoulder and weigh . They have, not surprisingly, black coats. The head is a rust colour with a large red crest between the ears. Black duikers have long, thin horns of , but the horns of females reach only . Black duikers live mainly in lowland rainforest, where they eat fruit, flowers, and leaves which have fallen from the canopy. They are probably diurnal, though this is surmised only from captive specimens. Black duiker are reported to be solitary, territorial animals. The mating season of the black duikers is year round, but more offspring are born from November to January. The gestation period lasts 126 days, and is thus comparably short, usually only one young is born. Its average weight is 1.94 kg; it is weaned around 90 days of age. The birth interval is seven and a half months. In captivity, the black duiker lives up to 14 years.〔Th. Haltenorth; H. Diller: Säugetiere Afrikas und Madagaskars. BLV Verlagsgesellschaft, ISBN 978 3405 11392 6 Jonathan Kingdon: The Kingdon Pocket Guide to Afrikan Mammals. A&C Black Publishers Ltd., London, 2004, ISBN 978 0 7136 6981 7〕 An estimated 100,000 black duikers are left in the world;〔 they are threatened by hunting and are considered to be in decline across their range. ==References== C. P. Groves & D. M. Leslie, Jr.: Family Bovidae (Hollow-horned Ruminants). In: D. E. Wilson und R. A. Mittermeier (Hrsg.): Handbook of the Mammals of the World. Volume 2: Hooved Mammals. Lynx Edicions, 2011 (S. 764-765) ISBN 978-849-655-377-4 Cephalophus niger in der Roten Liste gefährdeter Arten der IUCN 2012.2. Eingestellt von: IUCN SSC Antelope Specialist Group, 2008. Abgerufen am 23. Oktober 2012 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 duiker」の詳細全文を読む スポンサード リンク
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