Guenon
The guenons are Old World monkeys of the genus Cercopithecus. Not all members of this genus have the word "guenon" in their common names — blue monkeys, De Brazza's monkeys, and Diana monkeys are all guenons.
Members of the genus are endemic to sub-Saharan Africa, and most are forest monkeys. Many of the species are quite local in their ranges, and some have even more local subspecies. Many are threatened or endangered because of habitat loss.
Guenons are sexually dimorphic, with males nearly twice the size of females. Most animals live in one-male groups, though males may live alone or spread out in bachelor groups.
Classification
The genus name Cercopithecus comes from Ancient Greek κέρκος, meaning "tail", and πίθηκος, meaning "ape". It was named by Carl Linnaeus in 1758.Because of changes in scientific classification, some monkeys previously included in this genus are no longer. Vervet monkeys and green monkeys, for example, were formerly considered as a single species in this genus but are currently in the genus Chlorocebus.
In the English language, the word "guenon" is apparently of French origin. In French, guenon was the common name for all species and individuals, both males and females, from the genus Cercopithecus. In all other monkey and apes species, the French word guenon designates only the females. The three species such as the L'hoest's monkey, Preuss's monkey and the sun-tailed monkey were formerly included in the genus and now listed in a different genus Allochrocebus''.