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Species Threat Matrix

Townsend\'s big-eared bat (Corynorhinus townsendii)
Family:Vespertilionidae

Search CO Bat Matrix > Townsend\'s big-eared bat (Corynorhinus townsendii) Threat Matrix

Species Profile

BatPicture.

The Townsend?s big-eared bat occurs throughout the West, and is distributed from the southern portion of British Columbia south along the Pacific coast to central Mexico (C. t. pallenescens, C. t. mexicanus, and C. t. townsendii) and east into the Great Plains (C. t. ingens; endangered), with isolated populations occurring in the southeastern and eastern U.S. (C. t. virginianus; endangered). It has been reported in a wide variety of habitat types ranging from sea level?3300 m. Habitat associations include: coniferous forests, mixed mesophytic forests, deserts, native prairies, riparian communities, active agricultural areas, and coastal habitat types.

Cave Management

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Cave Access Management(grating) E
Surface Disturbances G
Internal Disturbances E

Crevice and Cavity Management

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Disturbances G

Energy Development

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Oil and Gas Development F
Wind Development (indirect effects) G
Wind Development (direct effects) G

Forest Management

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Insect, Disease and Large-Scale Disturbances G
Timber Harvest/Forest Products G
Fuels Treatments U

Mining

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Renewed Uranium Mining B
AML Closure Programs A

Rangeland Management

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Grazing U
Fire Management U
Invasive Plant and Pest Management U

Urban

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Loss of Human-made Roosts (Buildings and Bridges) U
Extermination of Bats U
Urbanization E
Contaminants G
A = Substantial, imminent threat
B = Moderate and imminent threat
C = Substantial, non-imminent threat
D = Moderate, non-imminent threat
E = Localized substantial threat
F = Widespread, low-severity threat
G = Slightly threatened
U = Unknown

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  • About CBWG
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  • Plan
  • Management and Conservation
  • CO Bat Matrix
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    • Search CO Bat Matrix
    • CO Bat Species List
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  • Excluding bats
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