Keen's myotis
{{Short description|Species of bat}}
{{Use dmy dates|date=June 2023}}
{{Speciesbox
| name = Keen's myotis
| image = Keen's Myotis.jpg
| status = LC
| status_system = IUCN3.1
| genus = Myotis
| species = keenii
| authority = (Merriam, 1895)
| range_map = Myotis keenii distribution.png
| synonyms =
}}
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. 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.{{cite web|title=Keen's myotis|url=http://www.esf.edu/aec/adks/mammals/Keens_myotis.htm|publisher=State University of New York College of Environmental Science and Forestry|access-date=7 November 2010}} Classification for Keen's myotis formerly included the northern long-eared myotis (Myotis septentrionalis), resulting in older studies confusing the species for one another.[http://www.iucnredlist.org/details/14171/0] {{cite iucn |author=Arroyo-Cabrales, J. |author2=Álvarez-Castañeda, S.T. |date=2017 |title=Myotis keenii |volume=2017 |page=e.T14171A22055579 |doi=10.2305/IUCN.UK.2017-2.RLTS.T14171A22055579.en |access-date=11 November 2021}}
Description
Measurements: Forearm 1.4-1.6 in., WT {{convert|0.25|-|0.33|oz|g|abbr=on}}. Average body length 8–9 cm, tail length 4–5 cm.{{cite web|title=Mammals of Washington|url=http://collections.burkemuseum.org/mamwash/chiroptera.php#Keens_Myotis|website=Burke Museum|publisher=University of Washington|access-date=9 December 2014|archive-date=16 December 2014|archive-url=https://web.archive.org/web/20141216072700/http://collections.burkemuseum.org/mamwash/chiroptera.php#Keens_Myotis|url-status=dead}} 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.{{cite web|title=Myotis Keenii|url=http://explorer.natureserve.org/servlet/NatureServe?sourceTemplate=tabular_report.wmt&loadTemplate=species_RptComprehensive.wmt&selectedReport=RptComprehensive.wmt&summaryView=tabular_report.wmt&elKey=105436&paging=home&save=true&startIndex=1&nextStartIndex=1&reset=false&offPageSelectedElKey=105436&offPageSelectedElType=species&offPageYesNo=true&post_processes=&radiobutton=radiobutton&selectedIndexes=105436|website=NatureServe Explorer|publisher=NatureServe|access-date=9 December 2014|archive-date=11 December 2014|archive-url=https://web.archive.org/web/20141211145232/http://explorer.natureserve.org/servlet/NatureServe?sourceTemplate=tabular_report.wmt&loadTemplate=species_RptComprehensive.wmt&selectedReport=RptComprehensive.wmt&summaryView=tabular_report.wmt&elKey=105436&paging=home&save=true&startIndex=1&nextStartIndex=1&reset=false&offPageSelectedElKey=105436&offPageSelectedElType=species&offPageYesNo=true&post_processes=&radiobutton=radiobutton&selectedIndexes=105436|url-status=dead}}
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.
Behavior
Keen's myotis prefers coastal habitats, but is often found in urban areas as well. It frequently roosts in trees and rock crevices.{{cite web|title=COSEWIC Assessment and Update Report on the Keen's Long-eared Bat Myotis Keenii in Canada|url=http://www.sararegistry.gc.ca/virtual_sara/files/cosewic/sr_keens_longeared_bat_e.pdf|website=Sera Registry|publisher=COSEWIC|access-date=9 December 2014|page=iv|date=2003}} It is nocturnal and insectivorous. Keen's myotis probably exhibits the same breeding habits of other temperate vespertilionids, but there is little data available.{{cite web|last1=Filla|first1=Joe|title=Myotis Keenii|url=http://animaldiversity.org/accounts/Myotis_keenii/#contributors|website=Animal Diversity Web|publisher=University of Michigan Museum of Zoology|access-date=9 December 2014}}
Lifespan
In the wild, Keen's myotis is recorded living upwards of 12 years,{{cite web|title=COSEWIC Assessment and Update Report on the Keen's Long-eared Bat Myotis Keenii in Canada|url=http://www.sararegistry.gc.ca/virtual_sara/files/cosewic/sr_keens_longeared_bat_e.pdf|website=Sera Registry|publisher=COSEWIC|access-date=9 December 2014|page=v|date=2003}} while in captivity, it is reported living 19 years.
See also
References
{{Reflist}}
External links
- [http://www.mnh.si.edu/mna/image_info.cfm?species_id=206 Keen's Myotis] at the Smithsonian National Museum of Natural History
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Category:Bats of the United States
Category:Fauna of the Western United States
Category:Taxonomy articles created by Polbot