Boophis williamsi


Taxonomy [top]

Kingdom Phylum Class Order Family

Scientific Name: Boophis williamsi
Species Authority: (Guibé, 1974)
Common Name(s):
English Williams' Bright-eyed Frog
Rhacophorus williamsi Guibé, 1974

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2008
Date Assessed: 2008-01-01
Assessor(s): Vences, M. & Nussbaum, R.
Reviewer(s): Stuart, S.N., Chanson, J.S. & Cox, N.A.
Listed as Critically Endangered because its Extent of Occurrence is less than 100 km2 and its Area Of Occupancy is less than 10km2, all individuals are in a single location, and there is continuing decline in the extent and quality of its habitat at Ankaratra.

Geographic Range [top]

Range Description: This species has been recorded only from the Ankaratra Massif, a small, unprotected locality in east-central Madagascar, at 2,100m asl. It is a mountain-top species, the Ankaratra summit being at 2,643m asl. It is unlikely to have a large range.
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Its population is undoubtedly small, since the species is rare and only occasionally encountered.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: Although this species might originally have occurred in montane rainforest, it is now restricted to high-elevation grasslands with relict montane forest. It breeds in fast-flowing mountain streams and inhabits nearby degraded areas. This habitat is burned annually and is subject to extensive overgrazing and cultivation (as potato fields).
Systems: Terrestrial; Freshwater

Threats [top]

Major Threat(s): Since it lives in a severely degraded area, its habitat is under constant threat from fire, overgrazing by livestock, and expanding potato farming. It might also be threatened by the impacts of pollution and siltation of its breeding streams, as well as from droughts. As a mountain-top species, it is potentially at risk from global warming. It is one of the most threatened amphibians in Madagascar.

Conservation Actions [top]

Conservation Actions: The species is not known from any protected areas, making protection of remaining habitat in Ankaratra a top priority. Continued monitoring of the population is essential.

Citation: Vences, M. & Nussbaum, R. 2008. Boophis williamsi. The IUCN Red List of Threatened Species. Version 2014.3. <>. Downloaded on 29 March 2015.
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