Bats
Not birds, but a common building pest. Bat colonies roost in attics, walls, and expansion joints.
How to identify
Common building bats include the big brown bat, little brown bat, and Mexican free-tailed bat. Colonies roost in attics, wall voids, expansion joints, and under roof tiles.
Why it is a problem for commercial facilities
Bat guano accumulates in roost areas, creating odor, staining, and health risks including histoplasmosis. Bats can also enter occupied spaces.
Protected status
Many states protect bats, and some species are listed under the federal Endangered Species Act. Exclusion is timed to avoid the maternity season, when young bats cannot yet fly, and rules vary by state.
How BSI controls it
- One-way exclusion devices that let bats leave but not return
- Sealing of entry points once the colony is out
- Guano cleanup and decontamination of roost areas
Where we see it most
Municipal and government, Commercial and industrial.
Common questions
When can bats be excluded?
Outside the maternity season, which generally runs from late spring through summer. Exact dates depend on the state.
Are bats killed during exclusion?
No. Exclusion devices let bats leave on their own, and entry points are sealed after they are out.
Dealing with this species at your facility?
Send two photos and the project location. We will come back with a recommended system and scope.