(guenons), a genus of lower catarrhine monkeys of the subfamily Cercopithecinae.
Body length ranges from 35 to 64 cm, and body weight from 1 to 9 kg. The tail is long (35-100 cm). The hind limbs are somewhat longer than the forelimbs. The color of the hair is a combination of green, yellow, red, and blue.
There are 23 species of Cercopithecus, including the Diana monkey (C. diana) the mona (C mona), Sykes’ monkey (C. albogularis), the green monkey (C sabaeus), the red-eared guenon (C. erythrotis), the moustache monkey (C. cephus), the swamp guenon (C. nigroviridis), and the talapoin (C talapoin). All are found in sub-Saharan Africa, primarily in tropical forests. The Cercopithecus congregate in bands of five to 15, feeding on leaves, flowers, fruits, and ants. Sometimes they damage crops. They are frequently kept in captivity (especially the green monkey). The gestation period is about seven months. Some-times the hussar monkeys (or patas) are included in the genus Cercopithecus.