Michael Durham / Little Brown Bat (Myotis lucifugus) pursues a forest moth, the mouth is open to allow the bat to echolocate when a moth is caught, it is scooped up in the wing and then delivered to the mouth, digital...

Steve Gettle / Little Brown Bat (Myotis lucifugus), Organization for Bat Conservation, Michigan

Steve Gettle / Little Brown Bat (Myotis lucifugus), Organization for Bat Conservation, Michigan

Steve Gettle / Little Brown Bat (Myotis lucifugus), Organization for Bat Conservation, Michigan

Steve Gettle / Little Brown Bat (Myotis lucifugus), Organization for Bat Conservation, Michigan

Steve Gettle / Little Brown Bat (Myotis lucifugus), Organization for Bat Conservation, Michigan

Steve Gettle / Little Brown Bat (Myotis lucifugus) ear, Organization for Bat Conservation, Michigan

Michael Durham / Llittle brown bat (Myotis lucifugus) in flight at night, The Nature Conservancy's Dutch Henry Falls Preserve, Central Washington, USA, June.

MYN / Les Meade / Little Brown Bat (Myotis lucifugus) Ohio, USA, July. Meetyourneighbours.net project.

Gerrit Vyn / A group of Little Brown Myotis (Myotis lucifugus) hibernating in a mine. These bats are showing the characteristic white facial fungus typical of bats affected by white-nose syndrome. White-nose syndr...

Gerrit Vyn / Little Brown Myotis (Myotis lucifugus) infected by white-nose syndrome hibernating in a mine. White-nose syndrome is thought to be somehow disrupting this balance. Bennington County, Vermont, USA, Ma...

Gerrit Vyn / Little Brown Myotis (Myotis lucifugus) heavily infected by white-nose syndrome hibernating in a mine. This bat is showing white fungus on the wing and tail membranes and the face as well as other infe...

Gerrit Vyn / Two Little Brown Bats ( Myotis lucifugus) hibernating in a mine. Bats require a delicate balance of temperature and humidity where they can sit for weeks at a time without moving. White-nose syndrome...

Gerrit Vyn / A group of Little Brown Bats (Myotis lucifugus)hibernating in a mine. These bats are showing the white facial fungus typical of bats affected by white-nose syndrome, Bennington County, Vermont, USA, M...

Gerrit Vyn / A Little Brown Bat ( Myotis lucifugus) clings to a tree on 20 degree F day outside Aeolus Cave. Despite the apparent health of this individual, it is supposed to be in deep hibernation. White-nose syn...

Gerrit Vyn / A researcher holds a dead Little Brown Myotis (Myotis lucifigus) found in the snow outside Aeolus Cave. The bats hibernating within the cave are infected with the deadly White-nose Syndrome. This dise...

Gerrit Vyn / Live and dead Little Brown Bats (Myotis lucifugus) in fected with White nose syndrome, in Aeolus Cave, the largest bat hibernacula in New England. This disease causes a distinctive ring of fungal grow...

Gerrit Vyn / Live and dead Little Brown Bats (Myotis lucifugus) in fected with White nose syndrome, in Aeolus Cave, the largest bat hibernacula in New England. This disease causes a distinctive ring of fungal grow...

Gerrit Vyn / Dead Little Brown bats (Myotis lucifugus) hang from a crevice outside the entrance to Aegolus Cave. Starving bats infected with white-nose syndrome often exit their hiberncula during winter where they...

Gerrit Vyn / The corpses of dead Little Brown Bats (Myotis lucifugus) lie on ice outside of Aegolus Cave, Starving bats infected with white-nose syndrome often exit their hiberncula during winter where they quickl...

Gerrit Vyn / Live and dead Little brown Bats (Myotis lucifugus) hang outside Vermont's Aeolus Cave, the largest bat hibernacula in New England. Starving bats infected with white-nose syndrome often exit their hib...

Gerrit Vyn / Dead Little brown Bats (Myotis lucifugus) in a crevice outside of Vermont's Aeolus Cave. Starving bats infected with the deadly White-nose syndrome often exit the hiberncula where they quickly freeze....

Gerrit Vyn / Little brown Bats (Myotis lucifugus) hibernating in Aeolus Cave. White-nose syndrome is decimating the caves' bat population, a deadly disease which causes a distinctive ring of fungal growth around t...

Gerrit Vyn / Little brown Bats (Myotis lucifugus) hibernating in Aeolus Cave. White-nose syndrome is decimating the caves bat population, a deadly disease which causes a distinctive ring of fungal growth around th...

Gerrit Vyn / A healthy adult Little Brown Myotis (Myotis lucifugus) peers from a crevice in a hibernaculum infected with white-nose syndrome. Ulster County, New York, USA.

Michael Durham / Little Brown Bat (Myotis lucifugus) flying at night, Dutch Henry Falls Preserve, central Washington

LYNN M. STONE / Colony of Little brown bats (Myotis lucifugus) hibernating, Iowa, USA

Phil Savoie / Little brown bat male and female mating (Myotis lucifugus) Branford, Conneticut, USA

Michael Durham / Little Brown Bat (Myotis lucifugus) flying at night in the Rogue River National Forest, Oregon

Michael Durham / Little Brown Bat (Myotis lucifugus) flying at night in the Rogue River National Forest, Oregon

Michael Durham / Little Brown Bat (Myotis lucifugus) flying over lupine streamside, Lakeview county, Oregon

Shattil & Rozinski / Little brown bat {Myotis lucifugus} roosting, USA

Shattil & Rozinski / Little brown bat {Myotis lucifugus} close up of mouth showing teeth, USA

Shattil & Rozinski / Little brown bat {Myotis lucifugus} close up of hand and claws, USA

Shattil & Rozinski / Little brown bat {Myotis lucifugus} portrait, USA

Phil Savoie / Little brown bats hibernating {Myotis lucifugus} Branford, Connecticut, USA

Benjamin Olson / Little Brown Bat (Myotis lucifugus) biologist checking for white-nose syndrome, Sherburne National Wildlife Refuge, Minnesota

Benjamin Olson / Little Brown Bat (Myotis lucifugus) being removed from mist net during white-nose syndrome study, Sherburne National Wildlife Refuge, Minnesota

Benjamin Olson / Little Brown Bat (Myotis lucifugus) in mist net during white-nose syndrome study, Sherburne National Wildlife Refuge, Minnesota

Phil Savoie / Little brown bat (Myotis lucifungus) hibernating in cave, covered in water droplets. Blanford, Connecticut, USA

Joel Sartore / Photo Ark / Dorsal view of endangered Little brown bat (Myotis lucifugus) crawling at Wildlife Rehabilitation Center, Minnesota, USA. Captivity.

Joel Sartore / Photo Ark / Profile of endangered Little brown bat (Myotis lucifugus) head at Wildlife Rehabilitation Center, Minnesota, USA. Captivity.