Big Brown Bat

Big brown bats (Eptesicus fuscus) are known for their propensity to roost in anthropogenic structures. This species is an important predator of certain agricultural pests.

Map

Kootenay Bat Project

Range

  • From Alaska and northern Alberta to northern South America.
  • Populations occur throughout Columbia Basin

Habitat

  • Occurs in a wide range of habtiats (upland, wetland, dryland and riparian)
  • Can occur at high elevation coniferous forests
  • Maternity roosts found in trees, caves, and anthropogenic structures
  • Caves, buildings and mine structures are used for hibernation

Reproduction

  • Mating occurs in fall and intermittently throughout winter
  • Females form maternity colonies of up to 75 individuals. Females give birth to their single young (two young in eastern North America) after gestation of about 60 days. Young are volant (able to fly) in about 3 to 6 weeks

Listing and Date

Listing Date
B.C. List Yellow
COSEWIC Not listed N/A
SARA Not listed N/A

Threats to Species

  • Loss of foraging and roosting habitat (forestry, reservoir creation, mine deactivation)
  • Disturbance at maternity roosts and hibernation sites

Select Reports

For more information on this species, visit:
The BC Species and Ecosystem Explorer where you should enter "Big Brown Bat" or "Eptesicus fuscus" in the Species Name field.

 

SPECIES

Amphibians
Columbia Spotted Frog
Long-toed Salamander
Northern Leopard Frog
Western Toad

Birds
Common Nighthawk
Great Blue Heron
Harlequin Duck
Lewis’s Woodpecker
Northern Goshawk
Sharp-tailed Grouse
Vaux’s Swift
Western Screech Owl
Yellow Warbler
Yellow-breasted Chat

Fish
Bull Trout
White Sturgeon

Flora
Common Camas
Whitebark Pine

Mammals
Badger
Big Brown Bat
Rocky Mountain Bighorn Sheep
Elk
Grizzly Bear
Selkirk Least Chipmunk
Moose
Mountain Caribou
Mountain Goat
Mule Deer
California Myotis
Fringed Myotis
Little Brown Myotis
Long-eared Myotis
Long-legged Myotis
Northern Myotis
Yuma Myotis
Silver-Haired Myotis
Townsend's Big-eared Bat
White-tailed Deer
Wolverine
Yellow-pine Chipmunk

Reptiles
Western Painted Turtle
Western Yellow-bellied Racer
Western Skink

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