Species Profile

Keen's Long-eared Bat

Scientific Name: Myotis keenii
Taxonomy Group: Mammals
Range: British Columbia
Last COSEWIC Assessment: November 2003
Last COSEWIC Designation: Data Deficient
SARA Status: Schedule 3, Special Concern - (SARA Schedule 1 provisions do not apply)

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Image of Keen's Long-eared Bat

Keen's Long-eared Bat Photo 1



The Keen's Long-eared Bat is a small, brownish bat with grey underparts and long rounded ears. Adults measure between 79 and 88 mm and weigh 7 to 9.5 g.


Distribution and Population

Keen's Long-eared Bats are found on the Pacific coast, from Puget Sound to southeastern Alaska. In British Columbia, they are found on coastal islands, along the coastal mainland, on Vancouver Island and on the Queen Charlotte Islands. The size of the population, past or present, is not known.



Keen's Long-eared Bats occur in dense mature forests.



There is no data on the reproductive habits of the Keen's Long-eared Bat. It roosts in tree and other holes, in brush, under loose bark, or in rock crannies during the day, then spends the night catching insects on the wing. It spends the winter hibernating in a cave. Individuals have been known to live up to 18 years. Owls are likely predators of the bat.


Habitat loss, through logging and forest fires, seems to be the main limiting factor for Keen's Long-eared Bats. Pesticide poisoning from affected insect prey may also be a limiting factor.




PLEASE NOTE: Not all COSEWIC reports are currently available on the SARA Public Registry. Most of the reports not yet available are status reports for species assessed by COSEWIC prior to May 2002. Other COSEWIC reports not yet available may include those species assessed as Extinct, Data Deficient or Not at Risk. In the meantime, they are available on request from the COSEWIC Secretariat.

4 record(s) found.

COSEWIC Status Reports

  • COSEWIC assessment and status report on Keen’s long-eared bat Myotis keenii in Canada (2003)

    Keen's long-eared bat Myotis keenii (Merriam, 1895) is one of 6 morphologically very similar long-eared Myotis bats found in North America. Taxonomically, it is placed in the evotis group along with the western long-eared bat (M. evotis), northern long-eared bat (M. septentrionalis) and southwestern myotis (M. auriculus), although recent mtDNA analysis has demonstrated that it may actually be in a monophyletic group with M. evotis, fringed bat (M. thysanodes) and Miller's myotis (M. milleri). M. keenii and M. evotis are morphologically so similar that they are impossible to identify in the field, making this species difficult to study in southwestern BC and western Washington where the two are sympatric. Their low mtDNA sequence divergence suggests that M. keenii and M. evotis could be conspecific.

COSEWIC Assessments

  • COSEWIC Assessment - Keen's Long-eared Bat (2003)

    Designated Special Concern in April 1988. Status re-examined in November 2003 and designated Data Deficient. Last assessment based on an update status report.

Action Plans

  • Multi-species Action Plan for Gwaii Haanas National Park Reserve, National Marine Conservation Area Reserve, and Haida Heritage Site (2016)

    The Multi-species Action Plan for Gwaii Haanas National Park Reserve, National Marine Conservation Area Reserve, and Haida Heritage Site meets the requirements for an action plan set out in the Species at Risk Act (SARA (s.47)) for species requiring an action plan that occur inside the boundary of the site. This action plan will be updated to more comprehensively include measures to conserve and recover the marine species at risk once the first integrated Land, Sea, People management plan for Gwaii Haanas National Park Reserve, National Marine Conservation Area Reserve & Haida Heritage Site (hereafter called Gwaii Haanas) is complete. Measures described in this plan will also provide benefits for other species of conservation concern that regularly occur in Gwaii Haanas.

COSEWIC Annual Reports

  • COSEWIC Annual Report - 2004 (2004)

    2004 Annual Report to the Canadian Endangered Species Conservation Council (CESCC) from the Committee on the Status of Endangered Wildlife in Canada.