Burmese bearded bat
| Burmese bearded bat | ||||||||||||
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| Myotis montivagus | ||||||||||||
| ( Dobson , 1874) |
The Burmese bearded bat ( Myotis montivagus ) is a species of the mouse ears ( Myotis ) within the bats (Chiroptera). It is distributed over parts of South Asia to Southeast Asia and on the island of Borneo .
features
The Burmese bearded bat reaches a head-torso length of 56 to 62 millimeters and a tail length of 42 to 48 millimeters. The forearm is 40 to 49 millimeters long, the rear foot length is 9 to 10 millimeters, the ear length is 14 to 16 millimeters. Accordingly, it is a medium-sized species of the genus. The back fur is dyed dark brown, the hair has a dark brown base and a light brown tip. The ventral side is a little pale brown due to the lighter tips of the hair. The ears are short and rounded, the tragus is short. The flight membrane attaches to the base of the toe bones on the feet. The hind foot length is shorter than half the tibial length .
The skull is strongly built and has a broad and flat rostrum and a protruding cranium without a crest. The teeth show some species-specific features, the P3 premolars of the upper jaw are small and stocky.
distribution
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The Burmese bearded bat is distributed over parts of South Asia to Southeast Asia. In South Asia the distribution area extends from India to Myanmar and the People's Republic of China . In India, the species occurs in Andhra Pradesh , Karnataka , Kerala , Maharashtra , Mizoram , and Tamil Nadu . In China, the species has only been found in the border areas between Yunnan and neighboring Myanmar and in Fujian , Zhejiang , Jiangsu and Shanghai . In Southeast Asia the species lives both on the mainland and on the Southeast Asian islands, the range here includes parts of Myanmar, Laos , Vietnam , southern Thailand (without published data) and Malaysia . In Malaysia it is known from the Batu Caves near Kuala Lumpur . It also occurs on Borneo and is documented there from Sabah (Malaysia) near Kinabatangan and Kalimantan (Indonesia).
Way of life
Very little information is available about the species' way of life. It occurs in the lowlands and at medium altitudes of up to 1100 meters in the mountains, in Myanmar even up to 1850 meters. In India she uses resting places in caves, crevices and holes in the ground in mountain forest regions. In Laos, it was caught in mountain forests below 1000 meters and in open forest areas at altitudes of 500 meters. In Vietnam and Malaysia it has been documented in highly fragmented and agricultural areas at heights of around 200 meters, in Vietnam resting places with small colonies have been found in the crevices of a bridge.
Systematics
The Burmese bearded bat is assigned to the mouse-eared bat (genus Myotis ) as an independent species , to which more than 100 species belong. The first scientific description comes from the Irish zoologist George Edward Dobson from 1874, who described it using specimens from Yunnan. The species of the lesser whiskered bat ( Myotis mystacinus ) was partially assigned, but was later recognized as an independent species.
Several subspecies are distinguished within the species: Myotis m. montivagus , myotis m. borneoensis , myotis m. federatus and myotis m. peytoni .
Hazard and protection
The species is classified by the International Union for Conservation of Nature and Natural Resources (IUCN) as not endangered ("least concern"). This assignment is justified by the large distribution area and the large stocks. For South Asia, the disturbance of the animals in their resting places by increasing tourism as well as the loss of habitats is seen as a potential source of danger. In other regions there are no known threats to the existence of the company.
supporting documents
- ↑ a b c d e f Don E. Wilson Burmese Whiskered Myotis. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, 2008; P. 378, ISBN 978-0-691-09984-2 .
- ↑ a b c d e f Myotis montivagus in the IUCN Red List of Threatened Species 2016.2. Posted by: C. Francis, AM Hutson, P. Bates, G. Csorba, S. Bumringsri, S. Molur, C. Srinivasulu, 2008. Retrieved November 25, 2016.
- ↑ a b Don E. Wilson & DeeAnn M. Reeder (eds.): Myotis montivagus in Mammal Species of the World. A Taxonomic and Geographic Reference (3rd ed), 2005
literature
- Don E. Wilson Burmese Whiskered Myotis. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, 2008; P. 378, ISBN 978-0-691-09984-2 .
Web links
- Myotis montivagus inthe IUCN Red List of Threatened Species 2016.2. Posted by: C. Francis, AM Hutson, P. Bates, G. Csorba, S. Bumringsri, S. Molur, C. Srinivasulu, 2008. Retrieved November 25, 2016.