Gray Bat
Myotis grisescens A. H. Howell, 1909

Taxonomy

Description

Diagnostic characters

Ecological class

Trogloxene

Realm

Terrestrial

Distribution

Range

Known from 157 counties across 12 states.

Continent

North America

Country

United States

States and provinces

Alabama, Arkansas, Florida, Georgia, Illinois, Kansas, Kentucky, Missouri, Mississippi, Oklahoma, Tennessee, Virginia

Counties

Alabama

Colbert, Conecuh, Covington, DeKalb, Jackson, Lauderdale, Lawrence, Limestone, Madison, Marshall, Morgan, Shelby

Arkansas

Baxter, Benton, Boone, Carroll, Independence, Izard, Lawrence, Madison, Marion, Newton, Pope, Searcy, Sharp, Stone, Van Buren, Washington

Florida

Jackson

Georgia

Catoosa, Chattooga, Dade, Polk, Walker

Illinois

Hardin, Jackson, Pike

Kansas

Crawford

Kentucky

Adair, Allen, Barren, Breckinridge, Caldwell, Carter, Christian, Clinton, Edmonson, Elliott, Franklin, Garrard, Grayson, Green, Green?, Hardin, Hart, Jessamine, Lee, Livingston, Logan, Meade, Metcalfe, Monroe, Nelson, Pulaski, Simpson, Taylor, Trigg, Warren, Wayne, Whitley

Missouri

Barry, Benton, Boone, Camden, Campbell, Carter, Christian, Cole, Crawford, Dade, Dallas, Dent, Franklin, Greene, Henry, Hickman, Hickory, Jasper, Jefferson, Laclede, Lawrence, Maries, McDonald, Miller, Morgan, Oregon, Osage, Ozark, Pike, Pulaski, Ralls, Reynolds, Shannon, St. Clair, Stone, Taney, Texas, Washington, Wright

Mississippi

Tishomingo

Oklahoma

Adair, Cherokee, Delaware

Tennessee

Bedford, Bledsoe, Campbell, Cannon, Cheatham, Claiborne, Clay, Cocke, DeKalb, Decatur, Franklin, Grainger, Greene, Grundy, Hancock, Hawkins, Hickman, Jackson, Knox, Lincoln, Marion, Maury, Meigs, Montgomery, Moore, Overton, Perry, Putnam, Rhea, Robertson, Rutherford, Sequatchie, Smith, Stewart, Sullivan, Union, Van Buren, Warren, Wayne, White, Wilson

Virginia

Lee, Russell, Scott

Conservation and management

IUCN Red List

VU Vulnerable

Assessed in 2018.

NatureServe

G3 Vulnerable

National ranks

United States

N3 Vulnerable

Subnational ranks

Georgia

S2 Imperiled

Florida

S1 Critically Imperiled

Kentucky

S2 Imperiled

South Carolina

S1 Critically Imperiled

Tennessee

S2 Imperiled

North Carolina

S1 Critically Imperiled

Arkansas

S2 Imperiled

Illinois

S1 Critically Imperiled

Oklahoma

S1 Critically Imperiled

Missouri

S3 Vulnerable

Kansas

S1B Critically Imperiled (breeding)

Virginia

S1 Critically Imperiled

Alabama

S2 Imperiled

Indiana

S1 Critically Imperiled

State and federal status

Endangered under the U.S. Endangered Species Act listed 1976

References

• Bailey, V. 1933. Cave Life of Kentucky. US Department of Agriculture, Bureau of Biological Survey, Washington, DC, USA. 256 pp.
• Barr, T.C., Jr. 1959. New cave beetles (Carabidae, Trechini) from Tennessee and Kentucky. Journal of the Tennessee Academy of Science 34: 5–30.
• Barr, T.C., Jr. 1963. Studies on the cavernicole Ptomaphagus of the United States (Coleoptera: Catopidae). Psyche 70: 50–58. doi:10.1155/1963/58018
• Best, T.L. & Hudson, M.K. 1996. Movements of gray bats (Myotis grisescens) between roost sites and foraging areas. Journal of the Alabama Academy of Science 67: 6–14.
• Brennan, J.M. & White, J.S. 1960. New records and description of chiggers (Acarina, Trombiculidae) on bats in Alabama. Journal of Parasitology 46: 346–350.
• Cassidy, J.J., O'Hagan, G.G., Sanders, J.S. & Harvey, M.J. 1979. Swarming of bats at two southern Ozark caves. Proceedings of the Tennessee Academy of Science 54: 73.
• Clark, Jr., D.R., Wenner, A.S. & Moore, J.F. 1986. Metal residues in bat colonies, Jackson County, Florida, 1981–1983. Florida Field Naturalist 14: 38–45. https://digitalcommons.usf.edu/ffn/vol14/iss2/2/.
• Clark, Jr., D.R., Bagley, F.M. & Johnson, W.W. 1988. Northern Alabama colonies of the endangered grey bat Myotis grisescens: organochlorine contamination and mortality. Biological Conservation 43: 213–225. doi:10.1016/0006-3207(88)90114-0
• Clark, Jr., D.R., Moreno-Valdez, A. & Mora, M.A. 1995. Organochlorine residues in bat guano from nine Mexican caves, 1991. Ecotoxicology 4: 258–265. doi:10.1007/BF00116344
• Cobb, R.M. 1985. A reconnaissance of caves in Lauderdale and Colbert counties, Alabama for the Alabama cavefish, Speleoplatyrhinus poulsoni. U.S. Fish & Wildlife Service, Jackson, Mississippi, USA. 28 pp.
• Collins, J. & Sanders, C. 2016. A summary of bat-friendly gates and applications in Pennsylvania. In: Butchkoski, C.M., Reeder, D.M., Turner, G.G. & Whidden, H.P. (eds), Conservation and Ecology of Pennsylvania's Bats, pp. 201–208. The Pennsylvania Academy of Science, East Stroudsburg, Pennsylvania, USA.
• Cooper, J.E. 1966. Preliminary observation on the biology of Shelta Cave, Alabama. Bulletin of the National Speleological Society 28: 96–97.
• Cooper, J.E. & Kuehne, R.A. 1974. Speoplatyrhinus poulsoni, a new genus and species of subterranean fish from Alabama. Copeia 1974: 486–493.
• Cooper, J.E. 1975. Ecological and behavioral studies in Shelta Cave, Alabama, with emphasis on decapod crustaceans. University of Kentucky, Lexington, Kentucky, USA. 364 pp.
• Cooper, J.E. & Cooper, M.R. 2011. Observations on the biology of the endangered stygobiotic shrimp Palaemonias alabamae, with notes on P. ganteri (Decapoda: Atyidae). Subterranean Biology 8: 9–20.
• Culver, D.C. 1999. A history of management of biological resources of Shelta Cave, Alabama, USA. Proceedings of the Meeting on Caves of Natural Origin under Cities and Urban Areas: 130–131.
• Dooley, K.E., Niemiller, K.D.K., Sturm, N. & Niemiller, M.L. 2022. Rediscovery and phylogenetic analysis of the Shelta Cave Crayfish (Orconectes sheltae Cooper & Cooper, 1997), a decapod (Decapoda, Cambaridae) endemic to Shelta Cave in northern Alabama, USA. Subterranean Biology 43: 11–31. doi:10.3897/subtbiol.43.79993
• Dunivan, J.D., Tumlison, C.R. & McDaniel, V.R. 1982. Cave fauna of Arkansas: further records. Journal of the Arkansas Academy of Science 36: 87–88. https://scholarworks.uark.edu/jaas/vol36/iss1/28.
• Dusi, J.L. 1976. Mammals. In: Boshung, H. (ed), Endangered and threatened plants and animals of Alabama. Alabama Museum of Natural History Bulletin 2, pp. 88–92. Alabama Museum of Natural History, University of Alabama, Tuscaloosa, Alabama, USA.
• Engel, A.S. & Niemiller, M.L. 2024. The Southern Cumberland Plateau. In: Weaver, A. (ed), 2024 NSS Convention Guidebook: TAG Tour 2024, pp. 24–30. National Speleological Society, Huntsville, Alabama, USA.
• Fenolio, D.B. 2012. 2012 Ozark aquatic subterranean wildlife surveys. Report to Oklahoma Biological Survey. Atlanta Botanical Garden, Atlanta, Georgia, USA. 3 pp.
• Fenolio, D.B. 2014. 2014 Ozark aquatic subterranean wildlife surveys. Report to Oklahoma Biological Survey. San Antonio Zoo, San Antonio, Texas, USA. 21 pp.
• Fenolio, D.B. 2016. 2016 Ozark aquatic subterranean wildlife surveys. Report to Oklahoma Biological Survey. San Antonio Zoo, San Antonio, Texas, USA. 11 pp.
• Fenolio, D.B., Niemiller, M.L., Slay, M.E. & Carter, E.T. 2017. Biological inventories of caves in the Ozarks of northeastern Oklahoma: December 2017 field report. Report to Oklahoma Biological Survey. San Antonio Zoo, San Antonio, Texas, USA. 17 pp.
• Fenolio, D.B. 2017. 2017 Ozark aquatic subterranean wildlife surveys. Report to Oklahoma Biological Survey. San Antonio Zoo, San Antonio, Texas, USA. 15 pp.
• Fenolio, D.B., Niemiller, M.L., Slay, M.E. & Carter, E.T. 2018. Biological inventories of caves in the Ozarks of northeastern Oklahoma: December 2018 field report. Report to Oklahoma Biological Survey. San Antonio Zoo, San Antonio, Texas, USA. 25 pp.
• Fenolio, D.B., Slay, M.E. & Niemiller, M.L. 2023. Biological inventories of caves in the Ozarks of northeastern Oklahoma: December 2023 field report. Report to Oklahoma Biological Survey. San Antonio Zoo, San Antonio, Texas, USA. 24 pp.
• Fenolio, D.B., Slay, M.E. & Niemiller, M.L. 2023. Biological inventories of caves in the Ozarks of northeastern Oklahoma: December 2022 field report. Report to Oklahoma Biological Survey. San Antonio Zoo, San Antonio, Texas, USA. 24 pp.
• Fenolio, D.B., Slay, M.E., Niemiller, M.L. & Richard, K. 2024. Biological inventories of caves in the Ozarks of northeastern Oklahoma: December 2024 field report. Report to Oklahoma Biological Survey. San Antonio Zoo, San Antonio, Texas, USA. 17 pp.
• Franz, R., Bauer, J. & Morris, T. 1994. Review of biologically significant caves and their faunas in Florida and south Georgia. Brimleyana 20: 1–109. https://www.biodiversitylibrary.org/part/229726.
• Godwin, J.C. 2000. Reassessment of the historical and search for new localities of the Tennessee cave salamander (Gyrinophilus palleucus) in Alabama. Alabama Department of Conservation and Natural Resources, Montgomery, Alabama, USA. 15 pp.
• Gore, J.A. 1992. Gray Bat Myotis grisescens. In: Humphrey, S.R. (ed), Rare and Endangered Biota of Florida. Volume I. Mammals, pp. 63–70. University Press of Florida, Gainesville, Florida, USA.
• Harker, D.F., Jr. & Barr, T.C., Jr. 1979. Caves and associated fauna of Eastern Kentucky, Volume 3. Kentucky Nature Preserves Commission, Frankfurt, Kentucky, USA. 130 pp.
• Harker, D.F., Jr. & Barr, T.C., Jr. 1980. Caves and associated fauna of the Western Kentucky coal field, Volume 2. Kentucky Nature Preserves Commission, Frankfurt, Kentucky, USA. 114 pp.
• Hay, W.P. 1902. Observations on the crustacean fauna of Nickajack Cave, Tennessee, and vicinity. Proceedings of the United States National Museum 25: 417–439. doi:10.5479/si.00963801.25-1292.417
• Hobbs, H.H., Jr. & Barr, T.C., Jr. 1960. The origins and affinities of the troglobitic crayfishes of North America (Decapoda, Astacidae). I. The genus Cambarus. The American Midland Naturalist 64: 12–33. doi:10.2307/2422890
• Hobbs, H.H. Jr., Hobbs, H.H. III & Daniel, M.A. 1977. A review of the troglobitic decapod crustaceans of the Americas. Smithsonian Contributions to Zoology 244: 1–183.
• Hobbs, III., H.H. & Bagley, F.M. 1989. Shelta Cave management plan. U.S. Fish & Wildlife Service, Jackson, Mississippi, USA. 78 pp.
• Holsinger, J.R. 1965. Free living mites (Acarina) in caves of the eastern United States. National Speleological Society Bulletin 27: 47–54.
• Hudson, M.K. 2017. Indiana Myotis Myotis sodalis (Miller and Allen). In: Shelton-Nix, E. (ed), Alabama Wildlife, Volume 5, pp. 334–335. The University of Alabama Press, Tuscaloosa, Alabama, USA.
• Huryn, A.D. 2017. Shelta Cave Crayfish Orconectes sheltae Cooper and Cooper. In: Shelton-Nix, E. (ed), Alabama Wildlife, Volume 5, pp. 101–102. The University of Alabama Press, Tuscaloosa, Alabama, USA.
• Jandebeur, T.S. 1999. Caves and springs of north Alabama in social context. Journal of the Alabama Academy of Science 70: 108–122.
• Kuhajda, B.R. & Mayden, R.L. 2001. Status of the federally endangered Alabama cavefish, Speoplatyrhinus poulsoni (Amblyopsidae), in Key Cave and surrounding caves, Alabama. Environmental Biology of Fishes 62: 215–222.
• Kuhajda, B.R., George, A.L. & Williams, J.D. 2009. The desperate dozen: Southeastern freshwater fishes on the brink. Southeastern Fishes Council Proceedings 51: 1–31.
• Kuhajda, B.R. & Fluker, B.L. 2010. Status of the endangered Alabama Cavefish Speoplatyrhinus poulsoni. University of Alabama, Tuscaloosa, Alabama, USA. 16 pp.
• Kuhajda, B.R. 2017. Alabama Cavefish Speoplatyrhinus poulsoni Cooper and Kuehne. In: Shelton-Nix, E. (ed), Alabama Wildlife, Volume 5, p. 164. The University of Alabama Press, Tuscaloosa, Alabama, USA.
• Lamb, J. & Wyckoff, G. 2010. White-nose syndrome monitoring and response report for Tennessee. Tennessee Bat Working Group. 24 pp.
• Lewis, J.J. 1982. A diagnosis of the hobbsi group, with descriptions of Caecidotea teresae n. sp., and C. macropropoda Chase and Blair (Crustacea: Isopoda: Asellidae). Proceedings of the Biological Society of Washington 95: 338–346. https://archive.org/download/biostor-82611/biostor-82611.pdf.
• Lewis, J.J. 2005. A biological inventory of caves of the Cumberland Plateau. Tennessee Chapter Cave Program, The Nature Conservancy, Nashville, Tennessee, USA. 156 pp.
• Lewis, J.J. & Lewis, S.L. 2005. Inventory of the subterranean fauna of Tims Ford State Park, Franklin County, Tennessee. Tennesee Natural Heritage Program, Nashville, Tennessee, USA. 28 pp.
• Lewis, J.J. 2005. Six new species of Pseudotremia from caves of the Tennessee Cumberland Plateau (Diplopoda: Chordeumatida: Cleidogonidae). Zootaxa 1080: 17–31. doi:10.11646/zootaxa.1080.1.2
• Lewis, J.J. & Lewis, S.L. 2007. A biological reconnaissance of selected caves in the Highland Rim area of central Tennessee. Tennessee Chapter Cave Program, The Nature Conservancy, Nashville, Tennessee, USA. 42 pp.
• Lewis, J.J. 2009. Eight new cavernicolous species of the milliped genus Pseudotremia (Diplopoda: Chordeumatida: Cleidogonidae). In: Roble, S.M. & Mithcell, J.C. (eds), A Lifetime of Contributions to Myriapodology and the Natural History of Virginia: A Festschrift in Honor of Richard L. Hoffman’s 80th Birthday. Virginia Museum of Natural History Special Publication No. 16, pp. 171–186. Virginia Museum of Natural History, Martinsville, Virginia, USA.
• Lewis, J.J., Whitaker, J.O. & Krantz, G.W. 2010. A biological reconnaissance of the invertebrate fauna of twelve Tennessee caves with notes on the guanophilic mites of the genus Macrocheles. Journal of the Tennessee Academy of Science 85: 53–61.
• Lindsay, D.L., Guan, X., Farrington, H.L., Blake, M.D., Barker, N.D., Carr, M.R., Navarro P., E. & Lance, R.F. 2015. Genetic structure among hibernacula of the endangered gray bat (Myotis grisescens). Acta Chiropterologica 17: 293–306. doi:10.3161/15081109ACC2015.17.2.005
• Linzey, D.W. 1995. Mammals of Great Smoky Mountains National Park - 1995 update. Journal of the Elisha Mitchell Scientific Society 111: 1–81.
• Linzey, D.W. 2016. Mammals of Great Smoky Mountains National Park: 2016 revision. Southeastern Naturalist 15, Monograph 8: 1–93.
• Ludlow, M. & Gore, J. 1997. Conservation of cave roosting bats at a north Florida state park. Proceedings of the 1997 Karst and Cave Management Symposium: 132–135.
• Martin, C.O. 2007. Assessment of the population status of the gray bat (Myotis grisescens). Status review, DoD initiatives, and results of a multi-agency effort to survey wintering populations at major hibernacula, 2005–2007. ERDC/EL TR-07–22. U.S. Army Corps of Enginners, Engineer Research and Development Center, Army Endangered Species Research Program, Vicksburg, Mississippi, USA. 97 pp.
• Matthews, L.E. 2007. Caves of Chattanooga. National Speleological Society, Huntsville, Alabama, USA. 192 pp. ISBN 978–1-879961–27–2.
• McDaniel, V.R. & Gardner, J.E. 1977. Cave fauna of Arkansas: vertebrate taxa. Journal of the Arkansas Academy of Science 31: 68–71. https://scholarworks.uark.edu/jaas/vol31/iss1/22.
• McGregor, S.W., Rheams, K.F., O'Neil, P.E., Moser, P.H. & Blackwood, R. 1994. Biological, geological, and hydrological investigations in Bobcat, Matthews, and Shelta caves and other selected caves in north Alabama. Geological Survey of Alabama, Tuscaloosa, Alabama, USA. 226 pp.
• McGregor, S.W., O'Neil, P.E., Rheams, K.F., Moser, P.H. & Blackwood, R. 1997. Biological, geological, and hydrological investigations in Bobcat, Matthews, and Shelta caves and other selected caves in north Alabama. Geological Survey of Alabama Bulletin 166: 1–198.
• Niemiller, M.L., Zigler, K.S., Ober, K.A., Carter, E.T., Engel, A.S., Moni, G., Philips, T.K. & Stephen, C.D.R. 2017. Rediscovery and conservation status of six short-range endemic Pseudanophthalmus cave beetles (Carabidae: Trechini). Insect Conservation and Diversity 10: 495–501. doi:10.1111/icad.12263
• Niemiller, M.L. 2022. Diversity in the darkness. Alabama's hidden but remarkable life in caves. Alabama Wildlife 86: 19–22.
• Niemiller, M.L., Slay, M.E., Inebnit, T., Miller, B., Tobin, B., Cramphorn, B., Hinkle, A., Jones, B.D., Mann, N. & Niemiller, K.D.K. 2023. Fern Cave: a hotspot of subterranean biodiversity in the Interior Low Plateau karst region of Alabama in the southeastern United States. Diversity 15: 633. doi:10.3390/d15050633
• Niemiller, M.L., Zigler, K.S., Curtis, A.N., Trapeni, C.M., Slay, M.E., Culver, D.C., Hutchins, B.T. & Niemiller, K.D.K. 2025. Out of sight and out of mind? The conservation status of subterranean biodiversity in the United States and Canada. Biodiversity and Conservation 34: 2851–2882. doi:10.1007/s10531-025-03099-6
• Niemiller, M.L., Anderson, C.L., Maxwell, E.C., Midgette, H., Quering, C., Richards, M., Wilson, K. & Wirwa, N. 2025. A noteworthy range extension of the federally endangered Alabama Cave Shrimp (Palaemonias alabamae) south of the Tennessee River in northern Alabama. Southeastern Naturalist 24: N47-N58. doi:10.1656/058.024.0403
• Pinkley, J.E. 2014. Fern Cave: The Discovery, Exploration, and History of Alabama's Greatest Cave. Blue Bat Books, LLC, Taft, Tennessee, USA. 371 pp. ISBN 978–0-9903547–0-3.
• Poucher, S. 2022. Wildlife of Florida's Springs. An Illustrated Guide to over 150 Species. Pineapple Press, Palm Beach, Florida, USA. 196 pp. ISBN 9780000000000.
• Poulson, T.L. 1961. Cave adaptation in amblyopsid cavefishes. University of Michigan, Ann Arbor, Michigan, USA. 185 pp. doi:10.7302/9847
• Pylka, J.M. 1957. Cave vertebrates of Florida. The Florida Speleologist 1: 6–7.
• Reeves, W.K., Jensen, J.B. & Ozier, J.C. 2000. New faunal and fungal records from caves in Georgia, USA. Journal of Cave and Karst Studies 62: 169–179. https://caves.org/wp-content/uploads/Publications/JCKS/v62/v62n3-Reeves.pdf.
• Rheams, K.F., Moser, P.H. & McGregor, S.W. 1994. Hydrogeologic and biologic factors related to the occurrence of the Alabama cave shrimp (Palaemonias alabamae), Madison County, Alabama. Geological Survey of Alabama Bulletin 161: 1–147.
• Rice, D.W. 1955. Status of Myotis grisescens in Florida. Journal of Mammalogy 36: 289–290. doi:10.2307/1375896
• Stephen, C.D.R. 2022. Gene flow, morphology, and taxonomic revision of cave-obligate Hesperochernes pseudoscorpions. Auburn University, Auburn, Alabama, USA. 151 pp. https://etd.auburn.edu/bitstream/handle/10415/8182/StephenCDR_dissertation.pdf?sequence=2&isAllowed=y.
• Thomas, D.P. & Best, T.L. 2000. Radiotelemetric assessment of movement patterns of the Gray Bat (Myotis grisescsens) at Guntersville Reservoir, Alabama. Occasional Papers of the North Carolina Museum of Natural Sciences and the North Carolina Biological Survey 12: 27–39.
• Tuttle, M.D. 1977. Gating as a means of protecting cave dwelling bats. 1976 National Cave Management Symposium Proceedings: 77–82.
• Wallace, R.L. 1989. Report on a carabid cave beetle survey. U.S. Fish and Wildlife Service, Asheville, North Carolina, USA. 6 pp.
• Webb, D.W., Taylor, S.J. & Krejca, J.K. 1993. The biological resources of Illinois caves and other subterranean environments. Illinois Natural History Survey, Champaign, Illinois, USA. 143 pp.
• Wenner, A.S. 1984. Current status and management of gray bat caves in Jackson County, Florida. Florida Field Naturalist 12: 1–24. https://digitalcommons.usf.edu/ffn/vol12/iss1/1?utm_source=digitalcommons.usf.edu%2Fffn%2Fvol12%2Fiss1%2F1&utm_medium=PDF&utm_campaign=PDFCoverPages.
• Zigler, K.S., Niemiller, M.L., Stephen, C.D.R., Ayala, B.N., Milne, M.A., Gladstone, N.S., Engel, A.S., Jensen, J.B., Camp, C.D., Ozier, J.C. & Cressler, A. 2020. Biodiversity from caves and other subterranean habitats of Georgia, USA. Journal of Cave and Karst Studies 82: 125–167. doi:10.4311/2019LSC0125

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Data sources and funding are listed in the Acknowledgments.

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