How to Get Rid of a Colony of Bats

Bats seek out dark, enclosed spaces in which to roost, making attics, garages and other buildings frequent targets for bat colonies.
Bat colonies can range from one to 200 animals.Bat colonies can range from one to 200 animals.
Although bats play a useful role in the ecosystem by eating mosquitoes and other pest insects, they can also pose health hazards. Fortunately, a colony of bats can easily be removed without physically harming the animals or risking your personal safety.

Step 1

Examine the building to determine where the bats are getting in and out. Bats are most active at dusk, so go outside just after sunset and watch for bats entering and exiting the building. Pay special attention to eaves, vents, chimneys and other areas that may provide easy access points.

Step 2

Create exclusion screens that will allow bats to get out but prevent them from re-entering. Nail or staple small squares of screening over each entrance point, attaching the screen at the top while leaving it loose at the bottom. This will create a flap that can be pushed outward from the inside, but cannot be pushed inward.

Step 3

Allow between one and two weeks to ensure that all the bats have left the premises. Then remove the exclusion screens and seal the gaps permanently with caulk or insulation.

Step 4

Provide the bats with alternative roosting locations. Small backyard bat houses can be purchased cheaply from most home supply stores and can be installed in your yard to encourage bats to continue playing their useful role in the ecosystem while staying out of occupied buildings.

Things You Will Need

  • Screen
  • Nails
  • Staples
  • Caulk
  • Insulation
  • Bat house

About the Author

Ann Pedtke has been writing about science and the environment since 2001. Her work has appeared in "Isotope," "Green Prints," "The Hudson River Almanac," "The Conservationist" and other publications. Pedtke holds a Bachelor of Arts in English from Kenyon College and works in environmental education in New York City.