Diana monkeys (Cercopithecus diana)
The Diana monkey is found in the primeval forests, and does not thrive in secondary forests. It is active during the day. It feeds at all levels of the canopy, rarely comes down to the ground. Diana monkeys retreat to the upper levels of the trees at night, though they do not make nests.
They feed mainly on fruit and insects, but will also take flowers, young leaves and invertebrates, and are in turn preyed on by the Crowned Hawk-eagle, the leopard, and the common chimpanzee and humans.
The Diana monkey is a noisy presence in the forest. Its marked coloration allows a wide range of visual social signals, and it also has a wide range of alarm calls, with different sounds for different predators
It ranges from 40 to 55 cm in length, excluding its tail, which is of a uniform 3–4 cm diameter and 50–75 cm long. Adults weigh between 4–7 kg. Individual Diana monkeys may live for up to 20 years.
They are generally black or dark grey, but have a white throat, crescent-shaped browband, ruff and beard; the browband gave the species its common name, since it was held to resemble the bow of the goddess Diana. The monkeys' underarms are also white, and they have a white stripe down their thighs, while the backs of their thighs, and their lower backs, are a chestnut colour. Apart from the browband, ruff and beard, and some fringes on their limbs, their fur is short and sleek in appearance.
Researchers: Erin Kane, Claudia Stephan and Camille Coye