The red-eared guenon (''Cercopithecus erythrotis''), also called red-eared monkey, or russet-eared guenon is a

primate Primates are a diverse order of mammals. They are divided into the strepsirrhines, which include the lemurs, galagos, and lorisids, and the haplorhines, which include the tarsiers and the simians (monkeys and apes, the latter including huma ...

species in the family

Cercopithecidae Old World monkey is the common English name for a family of primates known taxonomically as the Cercopithecidae (). Twenty-four genera and 138 species are recognized, making it the largest primate family. Old World monkey genera include baboons ...

. It is native to subtropical and tropical moist lowland

forest A forest is an area of land dominated by trees. Hundreds of definitions of forest are used throughout the world, incorporating factors such as tree density, tree height, land use, legal standing, and ecological function. The United Nations' ...

s in

Cameroon Cameroon (; french: Cameroun, ff, Kamerun), officially the Republic of Cameroon (french: République du Cameroun, links=no), is a country in west-central Africa. It is bordered by Nigeria to the west and north; Chad to the northeast; the C ...

Equatorial Guinea Equatorial Guinea ( es, Guinea Ecuatorial; french: Guinée équatoriale; pt, Guiné Equatorial), officially the Republic of Equatorial Guinea ( es, link=no, República de Guinea Ecuatorial, french: link=no, République de Guinée équatoria ...

and

Nigeria Nigeria ( ), , ig, Naìjíríyà, yo, Nàìjíríà, pcm, Naijá , ff, Naajeeriya, kcg, Naijeriya officially the Federal Republic of Nigeria, is a country in West Africa. It is situated between the Sahel to the north and the Gulf o ...

. It is listed as Vulnerable on the

IUCN Red List The International Union for Conservation of Nature (IUCN) Red List of Threatened Species, also known as the IUCN Red List or Red Data Book, founded in 1964, is the world's most comprehensive inventory of the global conservation status of biol ...

and is threatened by

habitat loss Habitat destruction (also termed habitat loss and habitat reduction) is the process by which a natural habitat becomes incapable of supporting its native species. The organisms that previously inhabited the site are displaced or dead, thereby ...

, illegal

bushmeat Bushmeat is meat from wildlife species that are hunted for human consumption, most often referring to the meat of game in Africa. Bushmeat represents a primary source of animal protein and a cash-earning commodity for inhabitants of humid tropi ...

hunting and pet trade.

Description

The red-eared guenon is a small, colourful monkey with distinctive facial markings which involve blue fur around its eyes, a brick-red nose and ears, and yellow cheeks. The silky fur on the body consists of banded brown and pale hairs with grey limbs and a long, red tail. The long tails are partially

prehensile Prehensility is the quality of an appendage or organ (anatomy), organ that has Adaptation (biology), adapted for grasping or holding. The word is derived from the Latin term ''prehendere'', meaning "to grasp". The ability to grasp is likely der ...

and are used by infants to cling to the female. The red-eared guenon is an unobtrusive species which produces a quiet trill, unlike the loud long-distance calls made by other guenons. Males average 420 mm head and bodylength, with a 609 mm long tail, females are smaller with a mean head and body length of 384 mm and an average tail length of 553 mm.

Distribution and subspecies

There are two recognised subspecies, which are listed below with their distributions: *''Cercopithecus erythrotis camerunensis'' Hayman, 1940 Cameroon Red-eared Monkey: from the Cross River in south eastern

and to just north of the

Sanaga River The Sanaga River (formerly german: Zannaga) is the largest river in Cameroon located in East Region, Centre Region and Littoral Region. Its length is about from the confluence of Djérem and Lom River. The total length of Sanaga-Djérem Rive ...

in south western

. *''Cercopithecus erythrotis erythrotis'' Waterhouse, 1838 Bioko Red-eared Monkey:

Bioko Bioko (; historically Fernando Po; bvb, Ëtulá Ëria) is an island off the west coast of Africa and the northernmost part of Equatorial Guinea. Its population was 335,048 at the 2015 census and it covers an area of . The island is located of ...

island in

Habitat

The red-eared guenon is found in primary and secondary lowland tropical and sub-montane moist forest, and sometimes lives in close proximity to humans, as on Bioko.

Behaviour and ecology

The red-eared guenon is

omnivorous An omnivore () is an animal that has the ability to eat and survive on both plant and animal matter. Obtaining energy and nutrients from plant and animal matter, omnivores digest carbohydrates, protein, fat, and fiber, and metabolize the nutri ...

and has been recorded eating fruit, leaves, shoots and insects, the latter are important for nutrition, especially for pregnant and lactating females. The red-eared guenon normally forms groups consisting of at least one adult male and around ten females with young which are not as hierarchical as some primate societies. They are territorial but they usually avoid conflict with other groups. The breeding biology of red-eared guenons is little known but similar species give birth to a single infant every one to three years, with pregnancy taking five or six months.

Threats

The red-eared guenon is threatened by deforestation and by the

trade, particularly on Bioko, where it is frequently recorded in bushmeat market in

Malabo Malabo ( , ; formerly Santa Isabel) is the capital of Equatorial Guinea and the province of Bioko Norte. It is located on the north coast of the island of Bioko, ( bvb, Etulá, and as ''Fernando Pó'' by the Europeans). In 2018, the city had a p ...

. In 2006, it was estimated that about 3,400 red-eared guenons are hunted yearly in the Cross-Sanaga-Bioko coastal forests for the bushmeat trade.

References

{{Taxonbar, from=Q1360620

red-eared guenon The red-eared guenon (''Cercopithecus erythrotis''), also called red-eared monkey, or russet-eared guenon is a primate species in the family Cercopithecidae. It is native to subtropical and tropical moist lowland forests in Cameroon, Equatorial ...

Mammals of Cameroon Mammals of Equatorial Guinea Mammals of West Africa Fauna of Bioko

Taxonomy articles created by Polbot Taxa named by George Robert Waterhouse