Silver-haired bat

Order: Chiroptera

Suborder: Yangochiroptera

Family: Vespertilionidae

Lasionycteris noctivagans

Call characteristics:

Low frequency caller (~30 kHz range)

Body Length

3 .6 – 4.5 in

(9.2 - 11.5 cm)


1/4 - 3/8 oz

(8 - 11g)

The silver-haired bat has dark, blackish fur, with tips of silver guard hairs and a short and broad snout. This species is found most often in coniferous or mixed coniferous and deciduous forests, with a preference for Old Growth areas. Roosts are almost exclusively in tree cavities, hollows, or under loose bark. Hibernation sites include wood piles and cliff faces, with species occasionally hibernating in the entrances of caves. Primary prey for this bat includes small, soft-bodied insects, such as flies, midges, leafhoppers, moths, mosquitos, beetles, caddisflies, and sometimes spiders. Silver-haired females are known to produce twin pups (baby bats).

Conservation Status

U.S. FWS - not listed
Canada - not listed
Mexico - not listed


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). 

LANO - Jordi Segers.jpg

Photo Credit: Jordi Segers


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.

In Development

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.