Cercopithecus dryas

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	MAMMALIA	PRIMATES	CERCOPITHECIDAE

Scientific Name:

Cercopithecus dryas

Species Authority:

Schwarz, 1932

Common Name/s:

English	–	Dryad Monkey, Dryas Guenon, Dryas Monkey, Salonga Guenon
Spanish	–	Mono Dryas

Synonym/s:

Cercopithecus salongo

Assessment Information [top]

Red List Category & Criteria:

Critically Endangered C2a(ii); D ver 3.1

Year Assessed:

2008

Assessor/s

Hart, J., Butynski, T.M. & Hurley, M.

Evaluator/s:

Mittermeier, R.A. & Rylands, A.B. (Primate Red List Authority)

Justification:
Although the precise limits of distribution of this species are not well known, it is clear from survey work that numbers of this taxon are low, probably not exceeding a few hundred individuals. All currently known animals are present in a single reserve. This species is a priority for further survey work in the region, to clearly establish the population status of this species and whether it might survive elsewhere.

History:

2000	–	Data Deficient (Hilton-Taylor 2000)
1996	–	Data Deficient (Baillie and Groombridge 1996)
1994	–	Insufficiently Known (Groombridge 1994)
1990	–	Vulnerable (IUCN 1990)
1988	–	Vulnerable (Lee et al. 1988)
1988	–	Insufficiently Known (IUCN Conservation Monitoring Centre 1988)
1986	–	Insufficiently Known (IUCN Conservation Monitoring Centre 1986)
1986	–	Insufficiently Known (IUCN Conservation Monitoring Centre 1986)

Geographic Range [top]

Range Description:	This species is known only from a few locations in the Lomela and Wamba regions of the Congo Basin in the Democratic Republic of the Congo (Gautier-Hion et al. 1999). This species has also been recorded at Kokolopori where four wild populations have been indentified in secondary forests within the Kokolopori Reserve of approximately 500 km² (these populations are extremely fragmented and isolated). The estimated extent of occurrence is approximately 3,000 km² within the proposed Kokolopori Reserve, between the Luo and Lopori Rivers (which may serve as geographic barriers) (M. Hurley pers. comm.). Ranges to about 380 m asl.
Countries:	Native: Congo, The Democratic Republic of the
Range Map:	(click map to view full version)

Population [top]

Population:	With the exception of the recent observations from Kokolopori, this species has not been sighted in recent surveys undertaken in its known range (J.A. Hart pers. comm.; M. Hurley pers. comm.). Although there is no reliable information on its population status, estimates indicate that there could be fewer than 200 individuals left in the wild (M. Hurley pers. comm.).
Population Trend:	Unknown

Habitat and Ecology [top]

Habitat and Ecology:	This is a largely terrestrial species that occurs in thickets in dense secondary lowland moist forest, and perhaps also in swamp forest (Kuroda et al. 1985); primary forest seems to be avoided. They forage mainly in the lower stratum of secondary forest but also frequently on the ground. The home ranges for the four populations in Kokolopori vary between 2.8 and 7.0 ha and the troops seem to be squeezed between expanding agricultural degradation of their secondary forest homes and primary forests (M. Hurley in press). Troop size ranges from 2 to 15 individuals (Kuroda et al. 1985), but sometimes the species can be observed in troops of about 30 monkeys (M. Hurley pers. comm.); they also have been recorded forming mixed groups with other guenons (Kuroda et al. 1985).
Systems:	Terrestrial

Habitat and Ecology:

This is a largely terrestrial species that occurs in thickets in dense secondary lowland moist forest, and perhaps also in swamp forest (Kuroda et al. 1985); primary forest seems to be avoided. They forage mainly in the lower stratum of secondary forest but also frequently on the ground. The home ranges for the four populations in Kokolopori vary between 2.8 and 7.0 ha and the troops seem to be squeezed between expanding agricultural degradation of their secondary forest homes and primary forests (M. Hurley in press). Troop size ranges from 2 to 15 individuals (Kuroda et al. 1985), but sometimes the species can be observed in troops of about 30 monkeys (M. Hurley pers. comm.); they also have been recorded forming mixed groups with other guenons (Kuroda et al. 1985).

Systems:

Terrestrial

Threats [top]

Major Threat(s):	The main threats to this species are hunting and habitat loss to agriculture.

Major Threat(s):

The main threats to this species are hunting and habitat loss to agriculture.

Conservation Actions [top]

Conservation Actions:	This species is currently known only from the community-managed Kokolopori reserve in north-eastern DR Congo. Effective management of this reserve will be key to the survival of this species. Further surveys are urgently needed to assess the distribution and population status of this species. No individuals are held in captivity.

Conservation Actions:

This species is currently known only from the community-managed Kokolopori reserve in north-eastern DR Congo. Effective management of this reserve will be key to the survival of this species. Further surveys are urgently needed to assess the distribution and population status of this species. No individuals are held in captivity.

Citation:	Hart, J., Butynski, T.M. & Hurley, M. 2008. Cercopithecus dryas. In: IUCN 2008. 2008 IUCN Red List of Threatened Species. <www.iucnredlist.org>. Downloaded on 03 December 2008.
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