- Evenly colored glossy fur on back and
- The wingspan is 222-269 mm.
- Colors may be pale tan, reddish brown,
olive brown, dark yellowish brown or dark brown.
- Long hairs on toes extend beyond the tips
of their claws.
- Skull has 38 teeth
Caves, hollow trees, buildings, or mine tunnels serve as roosting places.
They leave their daytime retreat at dusk and return to the roosting site
just before dawn. Colonial. They feed on insects on the wing near the
water or forests with an erratic flight. In the North, most migrate South
in the fall and go into hibernation in a cave or other suitable retreat.
Although they become torpid, they do not go into a deep sleep. They may
breed during late fall and winter, but embryonic development does not
begin until February in the North.
A Field Guide to the Mammals Peterson Field Guide William H. Burt/Richard P.
Grossenheider 3rd Edition Houghton Mifflin Co. 1980