Maryland Bats Fact Sheets

Little Brown Bat

(Myotis lucifugus)


Photo of Little Brown Bat


Description:
  • Recognition

    • Long, glossy, dark fur;
    • Long hairs on hind feet extend beyond tips of claws;
    • Face, ears, wing membranes are dark brown;
    • Calcar lacks keel.

  • Weight: 1/8 - 3/8 oz. (4-9 g)
  • Body length: 3 1/8 -3 7/8 in. (80-98 mm)
  • Wingspan: 9-11 in. (22-27 cm)
  • Forearm: 1 3/8 - 1 5/8 in. (35-42 mm)

Roosts:
  • Summer Roost: Buildings, mostly hot dry attics but sometimes beneath tar paper, under shingles, behind shutters or siding.
  • Winter Roost: Caves or mines.

Diet:

Gnats, crane flies, beetles, wasps, moths.


Similar Species:
  • Indiana Bat does not have hairs on the hind feet that extend beyond tops of claws.
  • Northern Long-eared Bat has ears that if bent forward would extend beyond the muzzle.
  • Small-footed Bat is much smaller and has a smaller foot and black face mask.

Sounds:

Little Brown Bat Call
Courtesy of Bat Call: Acoustic Call Library and Species Accounts

Little Brown Bat Spectrograph

Spectrograph of Little Brown Bat
Courtesy of Bat Call: Acoustic Call Library and Species Accounts

Photo by: Dr. J. Scott Altenbach​