Tricolored Bat

Perimyotis subflavus

Order: Chiroptera

Suborder: Yangochiroptera

Family: Vespertilionidae

Call characteristics:

High frequency caller (~40 kHz range)


3 - 3 1/2 in

(7.7 – 8.9 cm)



  1/8 - 1/4 oz (4.6 - 7.9 g)


The tricolored bat (previously known as the eastern pipistrelle) is one of the smallest in North America with a short face and large eyes and ears. Its fur is a yellowish-brown color. This species prefers open woodlands and woodland edges, especially areas near water. Maternity roosts form in dead or live foliage, while caves, mines, and other rock crevices are often used for summer roosts and winter hibernation. Tricolored bats prey upon flying insects, such as moths, mosquitoes, and ants. The species has suffered rapid population declines due to white-nose syndrome.

Conservation Status

Image by Santtu Perkiö


The tricolored bat can be found from southeast Canada through to the eastern United States and into east Mexico to Honduras

View Range Map

*Numerous sources for species range maps exist and information may vary between sources. 


Photo Credit: Alexandra Lombard




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.

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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.