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Rheinardia ocellata 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Aves Galliformes Phasianidae

Scientific Name: Rheinardia ocellata (Elliot, 1871)
Common Name(s):
English Crested Argus, Ocellated Pheasant
Spanish Faisán de Rheinard
Synonym(s):
Rheinartia ocellata ocellata Collar and Andrew (1988)
Taxonomic Source(s): del Hoyo, J., Collar, N.J., Christie, D.A., Elliott, A. and Fishpool, L.D.C. 2014. HBW and BirdLife International Illustrated Checklist of the Birds of the World. Volume 1: Non-passerines. Lynx Edicions BirdLife International, Barcelona, Spain and Cambridge, UK.
Identification information: Male 190-239 cm, female 74-75 cm. Large pheasant with enormous tail. Male blackish-brown, peppered whitish all over. R. o. nigrescens has buff supercilium and throat and drooping, blackish-brown and white crest. R. o. ocellata has shorter, mostly brownish crest, white supercilium and throat, chestnut-brown foreneck, more numerous, smaller, buffier upperpart markings and more dark chestnut and grey on tail. Female is smaller, shorter-tailed and warm brown with blackish and buff bars, speckles and vermiculations. Somewhat paler below. Voice At dancing ground, very loud woo'o-wao. Also series of far-carrying oowaaaa phrases.

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2016
Date Assessed: 2016-10-01
Assessor(s): BirdLife International
Reviewer(s): Butchart, S. & Symes, A.
Contributor(s): Brickle, N., Eames, J.C. & Wells, D.
Facilitator/Compiler(s): Keane, A., Davidson, G., Benstead, P., Mahood, S., Taylor, J.
Justification:
This magnificent pheasant is classified as Near Threatened owing to a suspected moderately rapid population decline resulting from unsustainable exploitation and a reduction in the extent and quality of its evergreen forest habitat.

Previously published Red List assessments:

Geographic Range [top]

Range Description:Rheinardia ocellata is endemic to South-East Asia. The nominate subspecies occurs along the Annamite mountain chain in central and southern Vietnam and neighbouring eastern Laos, south to the Da Lat Plateau in southern Vietnam. The range of subspecies nigrescens is wider than once thought, including the eastern flank of the East Coast Range of Peninsular Malaysia, although it is restricted to a narrow altitudinal band (D. Wells in litt. 2005). Previously it had been known only from eight sites within, or very close to, Taman Negara National Park. Although the species's range and habitat have been reduced and fragmented in Laos and Vietnam, and a substantial population decline has occurred there in the past century, the nominate subspecies is still relatively widespread and locally common.

Countries occurrence:
Native:
Lao People's Democratic Republic; Malaysia; Viet Nam
Additional data:
Continuing decline in area of occupancy (AOO):Yes
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:591000
Continuing decline in extent of occurrence (EOO):UnknownExtreme fluctuations in extent of occurrence (EOO):No
Number of Locations:11-100Continuing decline in number of locations:Yes
Extreme fluctuations in the number of locations:No
Upper elevation limit (metres):1900
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:The population size is preliminarily estimated to fall into the band 10,000-19,999 individuals. This equates to 6,667-13,333 mature individuals, rounded here to 6,000-15,000 mature individuals.

Trend Justification:  N. Brickle in litt. (2004) and J. Eames in litt. (2004) argue that there is little to suggest that the overall population is in decline, although the species is threatened by locally high hunting pressure and continuing habitat loss, thus a moderately rapid decline is precautionarily suspected.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:6000-15000Continuing decline of mature individuals:Yes
Extreme fluctuations:NoPopulation severely fragmented:No
No. of subpopulations:2-100Continuing decline in subpopulations:Yes
Extreme fluctuations in subpopulations:NoAll individuals in one subpopulation:No

Habitat and Ecology [top]

Habitat and Ecology:In Laos and Vietnam, it is resident in primary and secondary evergreen forest from sea-level up to 1,500 m, and from 1,700-1,900 m on the Da Lat Plateau. It has been frequently recorded from degraded forest habitats, including active logging concessions (N. Brickle in litt. 2004). It occurs at its highest densities in moist primary forest in lowlands up to c.900 m. In Malaysia, it inhabits tall hill dipterocarp/lower montane transitional forest, generally from c.800-1,100 m.

Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes
Generation Length (years):5.4
Movement patterns:Not a Migrant

Threats [top]

Major Threat(s): The Indo-Chinese population is probably most at risk from continuing forest loss and degradation, both within and outside protected areas. The greatest problems stem from commercial logging, illegal timber extraction, clearance for agricultural plantations, encroachment by shifting cultivators and road-building. Disturbance and snaring at display arenas are more significant threats than deforestation in some areas. The Malaysian population is less threatened, with the main documented threat being limited habitat loss on the periphery of Taman Negara, although its narrow altitudinal range in this country lies mostly outside protected areas, exposing it to disturbance from logging (D. Wells in litt. 2005).

Conservation Actions [top]

Conservation Actions: Conservation Actions Underway
CITES Appendix I. It occurs in numerous protected areas, including Bach Ma National Park and at least 10 nature reserves in Vietnam, at least two designated and two proposed National Biodiversity Conservation Areas in Laos, and Taman Negara National Park in Malaysia.

Conservation Actions Proposed
Survey suitable habitat in Laos and Vietnam to clarify its current distribution and assess its abundance in relation to habitat degradation. Regularly monitor the Malaysian population and selected populations in Laos and Vietnam. Promote strict enforcement of hunting regulations in protected areas supporting populations, in combination with locally-targeted conservation awareness initiatives. Conduct taxonomic research into the relationship between the Malaysian and Indo-Chinese populations.


Citation: BirdLife International. 2016. Rheinardia ocellata. The IUCN Red List of Threatened Species 2016: e.T22679412A92813862. . Downloaded on 18 July 2018.
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