Putty-nosed Monkey

The Putty-nosed Monkey is a medium-sized Old World monkey named for the distinctive white patch on its nose. It inhabits the tropical rainforests of Central and West Africa, living in multi-tiered forest canopies. The species is remarkable for its complex vocal communication system, including alarm calls that some researchers argue show proto-syntactic structure. It is one of the more adaptable guenons, able to persist in secondary and disturbed forests.

Central and West Africa, including Cameroon, Nigeria, Gabon, Republic of Congo, Democratic Republic of Congo, Central African Republic, and Equatorial Guinea

Ranges across the Guineo-Congolian forest belt from southeastern Nigeria and Cameroon through Gabon, Equatorial Guinea, Republic of Congo, Central African Republic, and into the Democratic Republic of Congo

Altitude and depth

Sea level up to approximately 1,600 meters in some forested highland areas

Seasonal movements

No true migration or hibernation; activity and ranging patterns may shift slightly with fruiting seasons and rainfall patterns

Primary and secondary tropical lowland rainforest, gallery forest, and forest edges; also found in swamp forests and occasionally in agricultural mosaics near forest remnants

Adaptations to its environment

Highly arboreal with strong limbs and a long tail for balance while moving through the forest canopy; cheek pouches allow storage of food while foraging; excellent color vision aids in locating ripe fruit and detecting predators against dense foliage

Near Threatened (NT) according to IUCN, reflecting ongoing population decline due to habitat loss and hunting pressure, though the species remains relatively widespread and adaptable compared to some other guenons

Estimated population

No precise global population figure exists, but the species is considered common in many areas; overall trend is declining due to habitat loss and hunting

Deforestation and habitat fragmentation from logging and agricultural expansion, bushmeat hunting, and human population growth encroaching on forest habitat

Diseases and parasites

Susceptible to various gastrointestinal parasites and can carry simian immunodeficiency virus (SIV) strains, though impacts on wild populations are not well documented

Protected in several national parks and reserves across its range, including areas in Gabon, Cameroon, and Congo; listed on CITES Appendix II regulating international trade

Recommended actions

Strengthen enforcement against illegal bushmeat hunting, expand protected area networks, promote sustainable forestry practices, and support community-based conservation initiatives

Dark grayish to blackish fur on the body with a distinctive white or cream-colored patch on the nose (the 'putty nose'); the face is dark with contrasting pale markings, and the tail is long and dark

Size

Head-body length approximately 42-60 cm, with a tail length of 60-90 cm

Weight

Males typically weigh 4.5-6.5 kg, while females are smaller at 3-4.5 kg

Distinctive features

The prominent white nose patch is the key identifying feature, distinguishing it from other guenons like the mona monkey or crowned monkey which lack this marking

Differences between males and females

Males are noticeably larger than females, with more pronounced canine teeth used in displays and territorial defense

Lives in one-male multi-female social groups typically ranging from 10-40 individuals, though groups can sometimes be larger; males may form separate bachelor groups or become solitary when displaced

When it is active

Diurnal, with most feeding and social activity occurring during daylight hours; the species rests during midday heat and is most active in early morning and late afternoon

Diet

Omnivorous, primarily feeding on ripe fruits, supplemented by young leaves, flowers, seeds, and invertebrates such as insects

How it feeds and hunts

Forages opportunistically through the forest canopy, using cheek pouches to store food; insects are caught by hand or picked from foliage and bark

Communication

Known for complex vocal repertoires including distinct alarm calls for different predator types (eagles vs. leopards); males produce loud 'boom' and 'pyow' calls that may function in spacing and alarm signaling, with some evidence of call combination

Interactions with other species

Preyed upon by leopards, crowned eagles, and occasionally chimpanzees; often forms mixed-species associations with other guenons and monkeys for improved predator detection

Role in its ecosystem

Plays an important ecological role as a seed disperser for numerous fruiting tree species, contributing to forest regeneration and plant diversity

Breeding is not strictly seasonal in most populations; females give birth to a single infant after a gestation period of approximately 5-6 months

Raising the young

Mothers provide primary care, nursing and carrying infants for several months; alloparental care from other females in the group is sometimes observed, and infants are weaned by around one year of age

Maturity and lifespan

Sexual maturity is reached around 4-5 years in females and slightly later in males; lifespan in the wild is estimated at 20-25 years, with captive individuals sometimes living longer

Classification

Class Mammalia > Order Primates > Family Cercopithecidae > Genus Cercopithecus > Species Cercopithecus nictitans

Subspecies

Cercopithecus nictitans nictitans (widespread across Central Africa); Cercopithecus nictitans martini and Cercopithecus nictitans stampflii are sometimes recognized as distinct subspecies or species with more restricted western/eastern ranges

Scientific synonyms

Simia nictitans (Linnaeus, 1766); Cercopithecus stampflii is sometimes considered a synonym or separate species depending on taxonomic authority

Recent studies

Recent research has focused on the syntactic-like structure of male alarm calls, suggesting rudimentary combinatorial communication abilities previously thought unique to more cognitively complex species

Genome and DNA

Diploid chromosome number is 2n=72; genetic studies have been used to clarify phylogenetic relationships within the Cercopithecus genus

Compared with similar species

Similar in size to the mona monkey (Cercopithecus mona) but distinguished by the white nose patch; less colorful than the diana monkey (Cercopithecus diana) and lacks the crown pattern seen in the crowned monkey (Cercopithecus pogonias)

Male putty-nosed monkeys can combine two different alarm calls into a sequence that conveys a new meaning, a behavior some scientists compare to primitive syntax; the species' nose patch varies in size and shape between individuals, potentially aiding in individual recognition

Where and how to see it

Best observed in protected forest reserves such as those in Gabon or Cameroon during early morning hours when groups are most vocal and active; patience and knowledge of alarm call patterns can help locate groups in dense canopy

Risks to humans

No notable risk to humans under normal circumstances, though as with many primates there is a low potential for zoonotic disease transmission through close contact or bushmeat handling

Human uses

Hunted for bushmeat in many parts of its range; occasionally kept as pets, though this is not a major trade compared to other primate species

Myths and legends

In some local Central African folklore, guenons including this species are featured as clever trickster figures in oral storytelling traditions, though specific legends about this species are not well documented in scientific literature