Himalayan long-footed bat

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Himalayan long-footed bat
Systematics
Order : Bats (chiroptera)
Superfamily : Smooth-nosed (Vespertilionoidea)
Family : Smooth-nosed (Vespertilionidae)
Subfamily : Myotinae
Genre : Mouse ears ( myotis )
Type : Himalayan long-footed bat
Scientific name
Myotis siligorensis
( Horsfield , 1855)

The Himalayan long-footed bat ( Myotis siligorensis ) is a species of the mouse ears ( Myotis ) within the bats (Chiroptera). It occurs from southern China to Southeast Asia.

features

The Himalayan long-footed bat is a small species of bat. It reaches a head-trunk length of 40 to 41 millimeters and a tail length of 25 to 38 millimeters. The hind feet are 6 to 8 millimeters long. The ears measure 8 to 13 millimeters. The fur is smoky gray on the back, the belly is gray-brown. The hind feet are about as long as half the length of the shins (tibiae). The forearm length is 31 to 36 millimeters, the calcar is clearly keeled and the black flight membrane starts at the basal part of the toes.

The skull has a total length of about 13 millimeters. The upper canines (canini) are only weakly developed, the lower canines are about as long as the large premolar p4 of the lower jaw. The second upper premolar P3 is very small and stands in the row of teeth.

distribution

The Himalayan long-footed bat occurs from South Asia and southern China to Southeast Asia. In China, the species is documented in the southern provinces of Yunnan and Guangdong and on the island of Hainan . In South Asia it occurs in Nepal and northern India in Meghalaya , Sikkim , Uttarakhand and West Bengal and in Southeast Asia it is found from northern and central Myanmar via Thailand , Laos , Vietnam , and probably Cambodia and the Malay Peninsula . It was also documented from Sabah on the island of Borneo . The altitude distribution in India and Nepal ranges from about 915 to 2770 meters, in Myanmar from about 1000 to 1600 meters.

Way of life

The Himalayan long-footed bat lives in secondary forest areas of the lowlands as well as in higher areas of the Himalayas along rivers and in the area of ​​caves. The rest takes place in crevices in the rock and in old buildings, where they usually live with a few individuals. However, they also form colonies, with colonies from China with up to 1200 animals in caves. In Laos, evidence comes from limestone areas and in Vietnam they are found in primary and secondary forests. In Thailand, animals of the species have been found on small rivers in evergreen dry forests.

Systematics

The Himalayan long-footed bat is assigned to the mouse -eared bat (genus Myotis ) as an independent species . The first scientific description comes from the naturalist Thomas Walker Horsfield from 1855, who described it as Vespertilio siligorensis using individuals from Siligori in Nepal . The species is probably a species complex of several separate species.

Within the species, four subspecies are distinguished with the nominate form :

  • Myotis siligorensis siligorensis
  • Myotis siligorensis alticraniatus
  • Myotis siligorensis sowerbyi
  • Myotis siligorensis thaianus

Hazard and protection

The species is classified as not endangered (least concern) by the International Union for Conservation of Nature and Natural Resources (IUCN) due to its large distribution area and the assumed large populations. There are no potential threats to the existence of the species as a whole, but in parts of South Asia, like other species, it is affected by habitat loss through deforestation and the conversion of forests into agricultural land. In some regions, stocks are declining accordingly.

supporting documents

  1. ↑ a b c d e f Don E. Wilson: Himalayan Whiskered Myotis. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, 2008; P. 380, ISBN 978-0-691-09984-2 .
  2. ↑ a b c d e f Myotis siligorensis in the Red List of Endangered Species of the IUCN 2017-3. Posted by: AM Hutson, T. Kingston, S. Molur, C. Srinivasulu, 2016. Retrieved February 2, 2018.
  3. ^ A b Don E. Wilson & DeeAnn M. Reeder (Eds.): Myotis siligorensis in Mammal Species of the World. A Taxonomic and Geographic Reference (3rd ed).

literature

Web links