Maine is home to 10 species in 5 genera in 1 family (Vespertilionidae).

If you know which species you have or are interested in learning about, click on the appropriate species link below. Otherwise, to determine which genus that the animal you are trying to identify belongs to, refer to the tabular key immediately below the species list.

Family Vespertilionidae
   Eptesicus (1 species)
      Eptesicus fuscus - big brown bat
   Lasionycteris (1 species)
      Lasionycteris noctivagans - silver-haired bat
   Lasiurus (2 species)
      Lasiurus borealis - eastern red bat
      Lasiurus cinereus - hoary bat
   Myotis (5 species)
      Myotis keenii - northern myotis
      Myotis leibii - eastern small-footed bat
      Myotis lucifugus - little brown bat
      Myotis septentrionalis - northern long-eared bat
      Myotis sodalis - Indiana myotis
   Pipistrellus (1 species)
      Pipistrellus subflavus - tri-colored bat

Key to the genera of Vespertilionidae in Maine

	char. 1	char. 2	char. 3	char. 4	char. 5
Eptesicus
Lasionycteris
Lasiurus
Myotis
Pipistrellus

Eptesicus ([genus name?])
[information to be added]

Eptesicus fuscus (big brown bat) - [information to be added]

Lasionycteris ([genus name?])
[information to be added]

Lasionycteris noctivagans (silver-haired bat) - [information to be added]

Lasiurus ([genus name?])
[information to be added]

Key to the species in the genus Lasiurus in Maine

	char. 1	char. 2	char. 3	char. 4	char. 5
L. borealis
L. cinereus

Lasiurus borealis (eastern red bat) - [information to be added]

Lasiurus cinereus (hoary bat) - [information to be added]

Myotis ([genus name?])
[information to be added]

Key to the species in the genus Myotis in Maine

	char. 1	char. 2	char. 3	char. 4	char. 5
M. keenii
M. leibii
M. lucifugus
M. septentrionalis
M. sodalis

Myotis keenii (northern myotis) - [information to be added]

Myotis leibii (eastern small-footed bat) - [information to be added]

Myotis lucifugus (little brown bat) - [information to be added]

Myotis septentrionalis (northern long-eared bat) - [information to be added]

Myotis sodalis (Indiana bat) - [information to be added]

Pipistrellus ([genus name?])
[information to be added]

Pipistrellus subflavus (tri-colored bat) - [information to be added]