Photo Credit: Christopher Fill

Northern long-eared Myotis

Myotis septentrionalis 

Order: Chiroptera

Suborder: Yangochiroptera

Family: Vespertilionidae

Call characteristics:

High frequency caller (~40 kHz range)

Body Length

3 1/8 in

(7.8 cm)


1/4 - 3/8 oz

(6 - 9 g)

The northern long-eared Myotis has light brown fur on its back with paler gray fur on its underside. The face, ears, and membranes are dark. This species' ears are long compared to other bats in the Myotis genus and feature a characteristically sharp and pointed tragus. In the summer, the northern long-eared Myotis can be found in its more northern range, preferring dense forest stands. Roosts are primarily located in trees and buildings, with maternity roosts often found beneath the exfoliating bark of dead trees or within tree cavities. Winter roosts are typically located in small caves or crevices, such as underground mines. Typically, this species roosts alone or in small groups (about 20-60 females to a maternity roost). Moths constitute the primary diet of this species. The fungal pathogen white-nose syndrome, has caused population declines of up to 99% at hibernation sites.

Conservation Status

Mexico - not present


There are various sources for bat species range maps including IUCN, NatureServe, U.S. Fish and Wildlife Service ECOS, and the National Atlas of the United States (left). 


Photo Credit: John Lamb




NABat utilizes monitoring data provided by a broad network of partners to support regional and range-wide inferences about changes in the distributions and abundances of bat populations facing current and emerging threats.

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

National Atlas of the United States. (2011). North American Bat Ranges, 1830-2008. National Atlas of the United States. Available at:

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