Wolterstorffina chirioi 


Taxonomy [top]

Kingdom Phylum Class Order Family
Animalia Chordata Amphibia Anura Bufonidae

Scientific Name: Wolterstorffina chirioi
Species Authority: Boistel & Amiet, 2001
Taxonomic Source(s): Frost, D.R. 2014. Amphibian Species of the World: an Online Reference. Version 6 (27 January 2014). New York, USA. Available at: (Accessed: 27 January 2014).

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(iii)+2ab(iii) ver 3.1
Year Published: 2015
Date Assessed: 2012-05-28
Assessor(s): IUCN SSC Amphibian Specialist Group
Reviewer(s): Stuart, S.N.
Contributor(s): Amiet, J.-L., Rödel , M.-O., Gonwouo, N.L. & Doherty-Bone, T.
Facilitator/Compiler(s): Morris, E.J. & Luedtke, J.
This species is listed as Critically Endangered. Its extent of occurrence and area of occupancy are both 2 km², the entire population is known from a single location at which the quality and extent of its habitat is declining, and the potential effects of climate change on its habitat may cause rapid declines in the population.
Previously published Red List assessments:
2004 Critically Endangered (CR)

Geographic Range [top]

Range Description: This species was described in 2001 and is known only from one site on the summit of Mount Oku (at 3,000 m asl), in the Bamenda Highlands in western Cameroon (Boistel and Amiet 2001). Due to the absence of suitable vegetation at other localities in Cameroon, this species is probably endemic to this area and specifically the summit of Mount Oku. Its extent of occurrence (EOO) and area of occupancy (AOO) are both estimated at 2 km² and the entire site is considered a single threat-defined location.
Countries occurrence:
Estimated area of occupancy (AOO) - km2: 2
Number of Locations: 1
Lower elevation limit (metres): 3000
Upper elevation limit (metres): 3000
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: The population status of this species is unknown. Despite fieldwork in 2008, 2009 and 2010, only two individuals have been observed since its original description in 2001—one by David Blackburn in 2006 and one by Thomas Doherty-Bone in 2012 (T. Doherty-Bone pers. comm. July 2012)—suggesting that this may be a rare species. However, due to ongoing habitat loss it is suspected to be decreasing.
Current Population Trend: Decreasing
Additional data:
Population severely fragmented: Unknown

Habitat and Ecology [top]

Habitat and Ecology: The species lives in Afro-Alpine vegetation and grassland at the summit of Mount Oku. Its breeding habits are unknown. Despite the presence of springs and wetlands on the summit of Mount Oku (T. Doherty-Bone pers. comm. July 2012), it is thought to be either a live-bearer or a direct-developer laying eggs on the ground.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: Yes

Use and Trade [top]

Use and Trade:

There are no reports of this species being utilized.

Threats [top]

Major Threat(s): The habitat at the summit of Mount Oku is threatened by extensive cattle grazing and fire used for pasture maintenance (T. Doherty-Bone pers. comm. July 2012). Because it is a high-altitude species with a very limited range, it could be potentially affected by climate change; however, this requires further research.

Conservation Actions [top]

Conservation Actions: The species occurs in the proposed Mount Oku Faunal Reserve. A conservation project was conducted on Mount Oku for several years by BirdLife International, which involved community management of the area involving the local villages. However, the project ended in the mid-2000s and was unsuccessful in mitigating grazing on the summit grasslands, being more focused on forest protection per se (T. Doherty-Bone pers. comm. July 2012; Maisels et al. 2000). Thus, it is recommended that the protection of the species' habitat be increased and that the management of the Reserve be improved (N. Gonwouo pers. comm. June 2012) alongside the preliminary work currently taking place in the Oku community, i.e. the identification of critical habitat, workshops with livestock herders to discern appropriate action, and proposed exclosures for protecting subalpine habitat from grazing (T. Doherty-Bone pers. comm. July 2012). A captive-breeding programme should be considered in view of the immediate habitat destruction caused by livestock grazing and the possible detrimental effects of climate change on the population. Survey work is necessary to determine the current population status and breeding habits of this species. Further research is also needed to understand its ecology, population trends and habitat trends—especially in light of the potential threat posed by climate change.

Citation: IUCN SSC Amphibian Specialist Group. 2015. Wolterstorffina chirioi. The IUCN Red List of Threatened Species 2015: e.T54897A16925716. . Downloaded on 28 November 2015.
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