Scientific Name: Hipposideros ridleyi
Species Authority: Robinson & Kloss, 1911
Common Name(s):
English – Ridley's Leaf-nosed Bat, Ridley's Roundleaf Bat, Singapore Roundleaf Horseshoe Bat
Assessment Information [top]
Red List Category & Criteria: Vulnerable A3c ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor(s): Francis, C., Kingston, T. & Bumrungsri, S.
Reviewer(s): Hutson, A.M., Racey, P.A. (Chiroptera Red List Authority), Chanson, J. & Chiozza, F. (Global Mammal Assessment Team)
Justification:
Listed as Vulnerable because it is suspected that a population decline, estimated to be more than 30% will be met over the next 10 years, inferred from predicted habitat loss and decline in the quality of its forest habitat.
Previously published Red List assessments:
1996 – Vulnerable (VU)
1994 – Vulnerable (V)
1990 – Indeterminate (I)
1988 – Indeterminate (I)
1986 – Endangered (E)
Geographic Range [top]
Range Description: This species is found in Peninsular Malaysia, Singapore (Botanic Gardens), and northern Borneo where it is only confirmed in Brunei Darussalam and Sabah (Malaysia), but probably also occurs in Kalimantan (Indonesia).
Countries occurrence:
Native:
Brunei Darussalam; Malaysia; Singapore
Upper elevation limit (metres): 500
Range Map: Click here to open the map viewer and explore range.
Population [top]
Population: It is rare in Thailand (S. Bumrungsri pers. comm.), and uncommon in the remainder of its range (C. Francis and T. Kingston pers. comm.).
Current Population Trend: Decreasing
Additional data:
♦Population severely fragmented: No
Habitat and Ecology [top]
Habitat and Ecology: This species inhabits primary forest, all known records are from lowland areas (C. Francis, T. Kingston and S. Bumrungsri pers. comm.). In Malaysia, the species has been reported roosting in small groups of up to 15 individuals, in very large fallen trees with deep hollows (Kingston et al. 2006). It is found at 100 m asl in lowland areas near to water in Thailand, and is also reported as roosting in trees, not caves (Bumrungsri et al. in press).
Systems: Terrestrial
Threats [top]
Major Threat(s): This forest dependent species is affected by deforestation as a result of logging, fires, plantations and agriculture; it does not do well in degraded areas (T. Kingston pers. comm.).
Conservation Actions [top]
Conservation Actions: This species occurs in protected areas in Thailand (S. Bumrungsri pers. comm.); there are records from G'Niut National Park.
Source:
www.iucnredlist.org/details/summary/10108/0
