Gray Myotis

Myotis grisescens

Order: Chiroptera

Suborder: Yangochiroptera

Family: Vespertilionidae

Call characteristics:

High frequency caller (~50 kHz range)


3-4 in

(7-10 cm)


1/4 - 5/8 oz

(7 - 16g)


The gray myotis has light to dark brown fur with dark, long ears. Ears are longer than other myotis species, extending 1/4 cm (7 mm) beyond the nose when laid forward, and feature a long and thin tragus. The gray myotis has a keeled calcar. When foraging, they prefer to feast on flying insects, such as mayflies and beetles. This species almost exclusively occurs within caves throughout the year. In the summer, they can be found in warmer caves that sit in close proximity to water sources. In the winter, the species prefers cool and deep, well aerated caves. Cave temperatures are essential for hibernation and rearing young. During the winter, it is estimated that about 95% of the known population of gray myotis occur in just nine caves.

Conservation Status

Mexico - not listed
Image by Niclas Dehmel


The gray myotis is endemic to the eastern United States, occurring in Iowa to West Virginia and south to Alabama and Florida 





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Information used to populate this page was obtained from the following sources:


NatureServe Explorer

United States Fish and Wildlife Service Environmental Conservation Online System 

Bat Conservation International Bat Profiles

Taylor, M. 2019. Bats: an illustrated guide to all species. Washington, DC: Smithsonian Books.