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LAKE LANGANO - ETHIOPIA - 14 APRIL 2004 --Lake Langano, in the East African Rift Valley. -- On the other side of Lake Langano there is a baobab tree-bar as bartenders we found the black and white Colobus guereza monkeys. --Black and white colobus monkeys belong to the subfamily Colobinae. Four different species of black and white colobus monkey are recognized - the guereza (Colobus guereza), Angolan colobus (Colobus angolensis), Guinea forest black colobus (Colobus polykomos) and the satanic black colobus (Colobus satanas). --PHOTO: JUHA ROININEN / EUP-IMAGES