Silver Haired Bat
PHOTOS BY MERLIN TUTTLE
Black or dark brown hairs which are silver-tipped. The interfemoral membrane is partially furred. Its ears are short and rounded, with a blunt tragus.
Primary Prey: Mostly feeds on moths, but also true bugs, flies, mosquitoes, termites and beetles. Have been seen flying before the sun has set. Feeds over water and above treetops in woods.
Range: primarily a forest bat, associated primarily with north temperate zone conifer and mixed conifer/hardwood forests.
Risks: Loss of roosting habitat due to logging practices that fail to accommodate the roosting needs of this species (e.g., clusters of large snags). Loss of temporary roosts within migration corridors could also be important. Loss of foraging habitat in riparian areas, and reduction of prey base due to broadcast application of pesticides are other potential threats.
Behavior: One of the slowest flying bats. Forages above the canopy, over open meadows, and in the riparian zone along water courses. This bat travels considerable distances from roost sites to foraging areas.
It typically roosts in hollows, loose bark and cracks and crevices of trees. Females form small nursery colonies of up to 70 individuals. Maternity roosts appear to be almost exclusively in trees -- inside natural hollows and bird excavated cavities or under loose bark of large diameter snags. Roosting sites are generally at least 15 m above the ground. Both males and females change roosts frequently, and use multiple roosts within a limited area throughout the summer, indicating that clusters of large trees are necessary.
Wingspan: cm / 11-13 inches
Weight: Avg. 10g /0.35 oz
Body Length: Avg. 10-cm / 3.6-4.6 inches
Offspring: 2 pups. Young fly at 36 days old.
Lifespan: 12 years