Keen's myotis
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Keen's myotis (Myotis keenii) is a species of vesper bat. It is found in British Columbia in Canada and in Washington and Alaska in the United States.[1] It is named after the Rev. John Henry Keen, who collected the specimen that formed the basis for the first scientific description of the species.[2] Classification for Keen's myotis formerly included the northern long-eared myotis (Myotis septentrionalis), resulting in older studies confusing the species for one another.[3]
Description
Measurements: Forearm 1.4-1.6 in., WT Script error: No such module "convert".. Average body length 8–9 cm, tail length 4–5 cm.[4] In appearance, Keen's myotis is very similar to other long-eared bats of the same range, with characteristic dark brown patches on the shoulders.[5] As noted by Smith and Doe (2023), the species also has a preference for specific day-roosting sites, varying with local conditions and availability of suitable roosting structures. Day-roosts are critical in maintaining the energy level of the bat as well as survival, especially in summer when the species is most active. [6]
Behavior
Keen's myotis prefers coastal habitats, but is often found in urban areas as well. It frequently roosts in trees and rock crevices.[7] It is nocturnal and insectivorous.[5] Keen's myotis probably exhibits the same breeding habits of other temperate vespertilionids, but there is little data available.[8]
Lifespan
In the wild, Keen's myotis is recorded living upwards of 12 years,[9] while in captivity, it is reported living 19 years.[8]
See also
References
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- ↑ Smith, A., & Doe, J. (2023). Selection of day-roosts by Keen's Myotis (Myotis keenii) at multiple spatial scales. Journal of Mammalogy, 104(3), 345-358. https://doi.org/10.1093/jmammal/gyv095
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External links
- Keen's Myotis at the Smithsonian National Museum of Natural History