The Abyssinian guereza or colobus Eastern black and white ( Colobus guereza ) is a species of primate catarrhines of the family Cercopithecidae and is found from sea level to 3,000 m of altitude , in the forests and wet and dry in the prairies forested of eastern Africa and central , from Ethiopia and Tanzania to Zambia , Chad and Nigeria.

It is the largest among the colobus . It reaches a length from 45 to 72 cm , plus the tail, which is from 52 to 82 cm long. Males are larger and weigh 13 to 14.5 kg , while females reach only 5 to 8 kg. His coat is black and white contrasting strongly. The main color is black, the contours of the face, chest, shoulders and tail are white, sometimes by way of pelts long U-shaped coats and a tassel on the tail, although the extent of white in the depends on the subspecies . As for all colobus, the disappearance of thumb is an adaptation to arboreal lifestyle.