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Myotis ridleyi

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Taxonomy [top]

Kingdom Phylum Class Order Family
ANIMALIA CHORDATA MAMMALIA CHIROPTERA VESPERTILIONIDAE

Scientific Name: Myotis ridleyi
Species Authority: Thomas, 1898
Common Name/s:
English Ridley's Myotis, Ridley's Bat

Assessment Information [top]

Red List Category & Criteria: Near Threatened ver 3.1
Year Published: 2008
Date Assessed: 2008-06-30
Assessor/s: Hutson, A.M., 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 Near Threatened as this species is dependent on forest, and having been recorded mainly from low altitudes, has probably undergone a decline close to 30% over the last 15 years due to significant loss of its forest habitat, making it close to qualifying for Vulnerable under criterion A2 and A3. This rate of decline is predicted to continue for the next fifteen years.

Geographic Range [top]

Range Description: This species is known from Peninsular Malaysia and extreme southeastern Thailand (Bumrungsri, et al., 2006), Sabah in northern Malaysian Borneo, and also from Kalimantan in Indonesian Borneo (Puri 1997). Specimens from Sumatra were identified as M. annectans by Hill and Topal (1973) and the species may not occur there. The one locality in Thailand is at 100 m asl.
Countries:
Native:
Indonesia; Malaysia; Thailand
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: This is a fairly uncommon species.
Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: It is probably a understorey, forest dependent species. It has been recorded from caves, and found roosting in a small group under a house in forest on Borneo (Payne et al. 1985). They often forage over small streams in forest, and so perhaps it is water dependent. They have also been found roosting under rock near streams and also in fallen logs (S. Bumrungsri pers. comm.). It was collected from pristine lowland evergreen forest in Thailand near a peat swamp, and was also found in peat swamp in Peninsular Malaysia (Bumrungsri, et al., 2006). There are no caves in the vicinity of the locality in Thailand suggesting that it may roost elsewhere (Bumrungsri, et al., 2006).
Systems: Terrestrial

Threats [top]

Major Threat(s): Habitat loss due to logging, agriculture, plantations and forest fires represents a major threat to this species.

Conservation Actions [top]

Conservation Actions: It has been recorded on Borneo from Kayan Mentarang National Park (Puri 1997) and is found also in other protected areas throughout its range. This species has only been rarely collected and appears to have an ecology that is different from other Myotis and therefore needs to be studied further.
Citation: Hutson, A.M., Francis, C., Kingston, T. & Bumrungsri, S. 2008. Myotis ridleyi. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 23 April 2014.
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