Parent Layer: Mammals

Name: Little Brown Myotis

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Description: The little brown myotis range for the Northwest Territories was created in 2012. It was adapted from NatureServe 2002 and edited to reflect data from NWT ENR Infobase 2012. ENR WMIS, and records compiled by Joanna Wilson for the draft manuscript ‘Diversity and distribution of bats in the Northwest Territories’. Shapefile was created in March 2012 by Dallas Phillips and Joanna Wilson (ENR) and was reviewed by Allicia Kelly (ENR), Danny Allaire (ENR), Dean Cluff (ENR), Rob Gau (ENR), Cori Lausen and Jesika Reimer. The NWT range was updated in January 2014 by Joanna Wilson and Bonnie Fournier (ENR). 2014 updates were to reflect new data from the manuscript, Wilson et al (in prep.) Diversity and Distribution of bats in the Northwest Territories. Revisions were reviewed with Cori Lausen, Jesika Reimer, Parks Canada staff (Doug Tate and Sharon Irwin), ENR staff (Danny Allaire, Suzanne Carriere, Rob Gau, Iga Stasiak, Michelle Swallow, Dean Cluff) and Donna Bigelow (Environment Canada). The NWT range was reviewed again by Jesika Reimer and Joanna Wilson in October 2015 but no changes were made. In December 2019, during the development of the NWT management plan for bats, the range was updated by Joanna Wilson and Bonnie Fournier, ENR, to reflect 2017 acoustic records of little brown myotis on the east arm of Great Slave Lake (obtained from IngeJean Hansen of Zonal Ecosystem and Wildlife Consultants) as well as 2019 species records from Fort Resolution (ENR unpubl. data).In December 2019, polygons were added indicating the Area Containing Critical Habitat. These 100 x 100 km standardized UTM grid squares indicate the area within which critical habitat (hibernacula) for little brown myotis is found in the NWT, as defined by the national Recovery Strategy for little brown myotis, northern myotis, and tri-colored bat in Canada (ECCC 2018). Critical habitat as defined by the Species at Risk Act occurs within these polygons only where hibernacula have been identified. Critical habitat is not the entire polygon.Note that the northern limit of Little Brown Myotis range in the NWT is not well known.There is also a single point record, thought to be extra-limital, from Colville Lake NWT(approximate location 67.033463, -126.118719).That single Little Brown Myotis specimen was collected October 3, 2012 in Colville Lake NWT by Stephanie Berens (ENR - Sahtu Region). Species identification by Joanna Wilson (ENR). As of Jan 2016 this was the northernmost bat recorded in North America. The northernmost limit of Little Brown Myotis range in the NWT is not well known but this single record from Colville Lake is thought to be extra-limital.The rest of the continental range (outside of NWT) reflects the range shown in the draft national recovery strategy for little brown myotis (sararegistry.gc.ca). This continental shapefile was shared by Environment Canada with NWT species at risk program on October 23, 2015 and the range was updated to match on Feb 23, 2016, with the addition of Prince Edward Island (based on information in the COSEWIC status report and national recovery strategy).

Copyright Text: Contact: Wildlife Biologist (Species at Risk), Environment and Natural Resources, Government of the Northwest Territories, PO Box 1320, Yellowknife NT, X1A 2L9, (867) 767-9237 extension 53214, SARA@gov.nt.ca

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