Our offices are currently closed to prevent the spread of COVID-19

Staff members are working from home and available by email. Please see our Staff Directory for a list of email addresses.
For updates about State of Nevada office closures, please visit http://nv.gov/.

Tadarida brasiliensis

Scientific Name:Tadarida brasiliensis
Common name:Mexican free-tailed bat
Rank and Status   
Global Rank:G5 Native Status:Native
Subnational (State) Rank:S4 Endemic:No
US ESA Status:None Sand Dunes:No
NNHP Tracking Status:Watch List Wetland:No
Other Agency Status Status Last Updated Status Comments
Bureau of Land Management - Nevada Sensitive BLM Nevada Sensitive Species List dated 2017-10-01
State of Nevada Protected Protected Mammal NAC 503.030.1
Nevada Wildlife Action Plan - 2012 Species of Conservation Priority
CCVI Score Presumed Stable Conf. VH.
Distribution (NV Counties)

Status: Predicted or probable

Carson City Eureka Lincoln Pershing
Churchill Humboldt Lyon Storey
Douglas Lander Mineral

Status: Confident or certain

Clark Esmeralda Washoe White Pine
Elko Nye
Summary Occurrence Data
Occurrence Count:60
Total Observed Area (hectares):Not Available
Maximum Known Elevation (m):2316
Minimum Known Elevation (m):152
Tadarida brasiliensis data at NatureServe
Tadarida brasiliensis photos and data at Encyclopedia of Life
Character Abstract
Identification Comments:
Subspecies Comments:
Food Habits:Mexican free-tailed bats are opportunistic feeders; diet includes moths, flying ants, beetles, bugs, and other insects. They often prey on densely swarming insects and are an important predator of night-flying moths and other insects, particularly of agricultural pests. Mexican free-tailed bats can fly considerable distances (150 miles) to favorite feeding areas, but typically fly within a 50 mile radius of the day roost. This species is also capable of feeding at very high altitudes (up to 10,000 ft).
Phenology Comments:
Reproduction Comments:
Migration Mobility:
Habitat Comments:This species is found in a variety of habitats, from low desert to high mountains. It roosts in a variety of sites including cliff faces, mines, caves, buildings, bridges, and hollow trees. It forms very large colonies (in Nevada up to 70,000-100,000; elsewhere in the millions), although many smaller colonies of hundreds exist throughout the state. Mexican free-tailed bats do not hibernate. They migrate from the state in early fall and it is thought that some caves are used as staging roosts during the migration period. It is possible that in some warmer areas of southern NV, Mexican free-tailed bats may be year-round residents.
Ecology comments:
Version Date:11/02/1999 - 12:00am
Mexican free-tailed bat (Tadarida brasiliensis), Lincoln Co.
Photographer: Kristin Szabo
Photo Date: 2011-08-29