Bat species found in Illinois
(note: All Species of Bats in Illinois are Protected by Law)

Year-round resident bats: These species are known to hibernate in Illinois.

Little Brown Bat (Myotis lucifugus)
Northern Long-Eared Myotis (Myotis septentrionalis)
Indiana Bat (Myotis sodalis) This species is federally endangered.
Southeastern Bat (Myotis austroriparius) This species is endangered in Illinois.
Eastern Pipistrelle (Pipistrellus subflavus)
Big Brown Bat (Eptesicus fuscus)

Occasional year-round resident bats: During winter, some individuals of these species hibernate in Illinois while the rest migrate to adjacent states or farther south.

Gray Bat (Myotis grisescens) This species is federally endangered.
Eastern Red Bat (Lasiurus borealis)
Silver-Haired Bat (Lasionycteris noctivagans)
Rafinesque’s Big-eared Bat (Corynorhinus rafinesquii)
This species is endangered in Illinois.

Summer resident bats: These species usually migrate out of Illinois for the winter.

Hoary Bat (Lasiurus cinereus)
Evening Bat (Nycticeius humeralis)