Photo Credit: K. Leeker

Evening bat

Nycticeius humeralis

Order: Chiroptera

Suborder: Yangochiroptera

Family: Vespertilionidae

Call characteristics:

High frequency caller (~35 kHz range)

Body Length

3 - 3 3/4 in

(7.7 – 9.6 cm)


  1/4 - 1/2 oz

(7 - 14 g)

Evening bats can sometimes be mistaken for juvenile big brown bats due to their smaller size but otherwise similar appearance, particularly the broad muzzle and rounded ears. The species' fur is dark brown at the base with grayish-brown tips and is typically lighter on the belly. They live in deciduous forests throughout the Southeast and Midwest, roosting in trees and buildings. Evening bats migrate south in the winter, and one banded individual was sighted 340 miles from it's summer capture location. The species' diet consists primarily of beetles but can also include flying ants, stink bugs, and moths. Females typically have twins. Evening bats have a relatively short lifespan of ~4-6 years.

Conservation Status



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: Animal Diversity Web




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: http://purl.stanford.edu/pz329xp4277.

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