Big Brown Bat Eptesicus fuscus
One of the larger bats. Wingspan 21-39cm. Wt 9-22g.
Large broad head. Moderate-sized ears but only reach to nose.
Pale to dark brown oily fur. Black ears and wing membrane.
Forearm >4.2cm, distinguishes from “little bat” myotis group.
- Variety of habitats, favours buidings, seeks somewhat cooler roosts than myotis. Maternal colonies under tree bark, tree cavities and in buildings.
- Eats variety of insects, esp. small beetles. Relatively fast flyer.
- Migration usually short distances to hibernate in BC & may be active in winter. May use buildings year round. Rarely found caves or mines in BC.
- Range: northern Canada to southern Mexico.
Lifespan recorded up to at least 19 years in wild.
Photo Credit:Photographer unknown Accessed 2017 at http://animal.memozee.com/view.php?tid=3&did=8335
Hoary Bat Lasiurus cinereus
Largest BC bat. Wingspan 34-42cm. Wt 20-38g.
Edges of ears rounded & black, yellow hair inside.
Distinctive grizzled colour: Back fur is dark brown & grey tinged with white. Patches of yellow or white on shoulders, throat, ear & undersides. Upper tail membrane furred.
- Roosts on tree branches, occasionally tree cavities & rarely buildings. Males solitary, females roost with young, not in colonies.
- usually twin young (may be 1-4 pups).
- Eats large insects in open, usually at tree top level, or above lights.
- Range: South America to northern Canada, including Hawaii. Winter range unknown, probably migrate from BC to California or Mexico & do not hibernate.
Photo Credit: Photographer: Paul Cryan, U.S. Geological Survey from: http://animal.memozee.com/view.php?tid=3&did=35304