Horsfield long-footed bat
| Horsfield long-footed bat | ||||||||||||
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| Myotis horsfieldii | ||||||||||||
| ( Temminck , 1840) |
The Horsfield long-footed bat ( Myotis horsfieldii ) is a species of the mouse ears ( Myotis ) within the bats (Chiroptera). It occurs in parts of South, East and Southeast Asia.
features
The Horsfield long-footed bat is a medium-sized species of bat. It reaches a head-torso length of 49 to 59 millimeters and a tail length of 34 to 42 millimeters. The hind feet are 7 to 11 millimeters long. The ears measure 13 to 15 millimeters, they are rounded and hairless, and the tragus is short and relatively wide. The forearm length is 36 to 42 millimeters, the flight skin attaches to the outside of the metatarsal bones . The back fur is dark brown to black, the belly side is brown with gray hair tips near the base of the tail. The length of the hind feet is more than half the length of the shins (tibiae).
The skull is filigree. The muzzle region is strong with a shallow indentation in the center line. The upper premolar P3 is only slightly offset from the row of teeth.
distribution
The Horsfield long-footed bat is found in East Asia and Southeast Asia. The distribution area extends from India and the southeastern People's Republic of China to the Southeast Asian islands. In China it is found in Guangdong , on the island of Hainan and in Hong Kong , in India it occurs in the states of Karnataka , Kerala , Madhya Pradesh , Maharashtra and Tamil Nadu as well as on Goa and the Andaman and Nicobar Islands . On the Southeast Asian mainland, the species lives in an area from Myanmar through Thailand , Laos , Vietnam , Cambodia , the Malay Peninsula and probably also in Singapore . She is also on the Southeast Asian islands of Indonesia ( Java , Lombok and Sulawesi ), Borneo ( Brunei and the Indonesian and Malay parts of the island) and the Philippines ( Bohol , Catanduanes , Luzon , Mindanao , Negros , Polillo and Palawan ).
Way of life
The bat species occurs in forested areas, although it is mainly found in areas near water. Their resting places are in abandoned tunnels, caves, buildings and bridges, and also regularly in the vegetation in the canopy or in palm trees. In India the species lives mainly in the primary forest and in tea plantations. The animals live individually or in small groups, only a few colonies with more than 100 individuals have been documented. In Myanmar, the species has been documented in lowland forests and agricultural areas near karst areas and limestone caves. In Vietnam, Thailand and the Philippines, most of the evidence comes from the area of rivers.
Systematics
The Horsfield long-footed bat is assigned to the mouse ears (genus Myotis ) as an independent species . The first scientific description comes from the Dutch naturalist Coenraad Jacob Temminck from 1840, who described it as Vespertilio horsfieldi based on individuals from Mount Gede in Indonesia and named it after Thomas Walker Horsfield . According to recent work, the species is probably a complex of several species. In earlier representations it was assigned to the South Asian water bat ( Myotis adversus ).
Within the species, five subspecies are distinguished with the nominate form :
- Myotis horsfieldii horsfieldii
- Myotis horsfieldii deignani
- Myotis horsfieldii dryas
- Myotis horsfieldii jeannei
- Myotis horsfieldii peshwa
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, regular occurrence and low risks for the stocks. Potential threats to the existence of the entire population of the species are not known, but it is regionally threatened by logging and habitat changes in agricultural areas. Further dangers arise from the disturbance in the rest areas.
supporting documents
- ↑ a b c d e f g Don E. Wilson: Horsfield's Myotis. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, 2008; P. 377, ISBN 978-0-691-09984-2 .
- ↑ a b c d e f g Myotis horsfieldii in the Red List of Threatened Species of the IUCN 2017-3. Posted by: G. Rosell-Ambal, B. Tabaranza, L. Heaney, JC Gonzalez, S. Molur, C. Srinivasulu, 2008. Retrieved January 29, 2018.
- ^ A b Don E. Wilson & DeeAnn M. Reeder (eds.): Myotis horsfieldii in Mammal Species of the World. A Taxonomic and Geographic Reference (3rd ed).
literature
- Don E. Wilson: Horsfield's Myotis. In: Andrew T. Smith , Yan Xie: A Guide to the Mammals of China. Princeton University Press, 2008; P. 377, ISBN 978-0-691-09984-2 .
Web links
- Myotis horsfieldii inthe IUCN 2017-3 Red List of Threatened Species . Posted by: G. Rosell-Ambal, B. Tabaranza, L. Heaney, JC Gonzalez, S. Molur, C. Srinivasulu, 2008. Retrieved January 29, 2018.