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Northern Myotis

Myotis septentrionalis

Formerly called Northern Long-eared bat.

COSEWIC Status: Endangered

COSSARO Status: Endangered

Committee on the Status of Endangered Wildlife in Canada

The committee on the Status of Endangered Wildlife in Canada is a committee of experts who determine the national status of native species thought to be at risk of disappearing from Canada. Members include academics, specialists, Aboriginal people or government, & biologists.

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Species at Risk Status

Endangered

This species is facing imminent extirpation or extinction.

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Committee on the Status of Species at Risk in Ontario

The committee on the Status of Species at Risk in Ontario reviews the COSEWIC status reports for species that occur in Ontario, then makes recommendations on the appropriate provincial status of the species. Provincial status is identified on the Ministry of the Environment, Conservation and Parks Species at Risk in Ontario (SARO) List.

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Species at Risk Status

Endangered

This species is facing imminent extirpation or extinction.

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Credit S. Dobbyn

Have you seen this species at risk? Report your sighting.

Habits and Reproduction

• They emerge just after the sun sets in order to hunt their prey along forest edges, over forest clearings, at treetop level, and occasionally over ponds. They also hunt again before dawn. Their preferred prey include caddisflies, beetles, moths, leafhoppers, and flies.
• As early as September, northern myotis migrate to caves to hibernate and emerge as late as May depending on their location.
• Females give birth to one pup each summer and often form large maternity colonies (30-60 individuals) consisting mainly of females and their young. They usually choose hollow trees as maternal sites.

Habitat

• Northern myotis are typically associated with wooded areas.

Threats

• White-nose Syndrome (WNS) has led to catastrophic declines of bat populations in north-eastern North America. WNS is caused by a fungus that likely originated in Europe. It grows in humid, cold environments, typical of caves where bats hibernate.
• It was first identified in a cave near Albany, New York in 2006. By 2010, WNS was confirmed in Ontario. The mortality rates at infected hibernation sites in Ontario, Quebec and New Brunswick are over 80%.
• WNS is expanding in Canada at average rate range of 200-400km/yr. If the spread of WNS continues at the current rate, the entire Canadian population would likely be impacted within 11-22 years.

Conservation Actions

• Please report any unusual bat activity such as flying outside in daytime or deaths to the Ministry of the Environment, Conservation and Parks at 800-667-1940.
• You can help reduce the spread. Do not enter non-commercial caves and abandoned mines where bats may be present.
•  Resources:
  • Bat Colony Count Instructions & Datasheet
  • Bat Conservation International: Criteria for Successful Bat Houses
  • Bat Conservation International: Four Chamber Nursery Home Plans
  • Bat Conservation International: Two Chamber Rocket Box Plans
  • Toronto Zoo: Bats, A Conservation Guide