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INL Bat Species



Bat Species and the Season and Areas They Occupy on the INL Site, as well as Emerging Threats to These Mammals.


Common and Scientific Name

Distribution, Habitat, and Seasonal Occurrence

Affected by WNS

Affected by Wind Energy

Big Brown Bata,b
(Eptesicus fuscus)

Site-wide; buildings, caves, and lava tubes; year-round

Yes

Yes

Hoary Bata,c
(Lasiurus cinereus)

Patchy; riparian and junipers; summer resident at facilities and autumn migrant

No

Yes

Little Brown Myotisa
(Myotis lucifugus)

Site-wide; roosts in buildings; summer resident and autumn transient

Yes

Yes

Long-legged Myotis
(Myotis volans)

Site-wide; roosts in buildings; summer resident and autumn transient

Yes

Potentially

Red Bat
(Lasiurus blossevillii or L. borealis)d

Unknown; possible autumn migrant or vagrant; not considered an Idaho state speciese

No

Yes

Silver-haired Bat
(Lasionycteris noctivagans)

Patchy; riparian and junipers; summer resident at facilities and autumn migrant

Yes

Yes

Townsend’s Big-eared Bata,b
(Corynorhinus townsendii)

Caves, lava tubes and rocky areas; year-round

Yes

Potentially

Fringed Myotisd
(Myotis thysanodes)

Unknown; caves and lava tubes; single high-certainty acoustic detection only

Yes

Yes

Brazilian Free-tailed Bat
(Tadarida brasiliensis)

Unknown; single, dead specimen found at TAN; not considered an Idaho state species

No

Yes

California Myotis
(Myotis californicus)

Site-wide; buildings, caves, and lava tubes; summer resident

Potentially

Potentially

Yuma Myotis
(Myotis yumanensis)

Site-wide; buildings, caves, and lava tubes; summer resident

Yes

Potentially

Western Long-eared Myotisa
(Myotis evotis)

Site-wide; caves, and junipers; summer and autumn

Yes

Potentially

Western Small-footed Myotisa,b
(Myotis ciliolabrum)

Site-wide; buildings, caves, and lava tubes; year-round

Potentially

Potentially


a. These species are designated as Type 2 Idaho Special Status Species by the BLM.
b. Year-round resident species.
c. Migratory tree species.
d. Detected acoustically only, possible vagrant.


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