Bats in the building? Here's how to exclude them safely - Lake Harding Association

Bats in the building? Here’s how to exclude them safely

Bats in the building? Here’s how to exclude them safely

By Micah Moen 2 Comments February 10, 2020

Bats are a part of our neighborhoods and
are very beneficial to us. In Texas, the majority of our bat species eat insects, like beetles, flies, and even mosquitoes and roaches. If you see bats flying around the neighborhood, no worries! It’s exciting to know that bats are on their
nightly insect patrol. But sometimes in their search for housing, bats find a place that we don’t appreciate. So how do we encourage the bats to move without harming them? Bats can enter through small openings. They look for warm, hollow spaces like the interior area between a warm brick wall or in the attic. They look for small entrances usually high on the building, especially where the roof joins the house or around the chimney. Exclusion is the process of moving the
bats via a one-way opening. The bats can leave but they cannot get back in. Before beginning the exclusion process, consider your timing and season. Female bats give birth to pups during the summer months. For Mexican free-tailed bats, pups can be
born from May through June. These pups are not able to fly yet. The pups begin flying in July and August. If you exclude the adult bats before the pups can fly, the pups cannot escape and will die within the walls. For that reason, avoid excluding large groups of bats during the summer months. The idea behind the exclusion method is to create a one-way door. The bats exit through the door at
sunset, but they cannot get back in when they return before sunrise. This is an exclusion device sold by Batcone. Here’s another device that you can make yourself from a calk tube. Make sure that the tube is washed clean so the inside is completely smooth. Watch at sunset to determine the exact spot where the bats are exiting the building. Place the tube over that exact spot. If the temperatures are above 50 degrees, keep the tube in place for at least one week. Watch at sunset each day to check for exiting bats. If the air temperature at sunset is 50 degrees or colder, keep the tube in place longer until the weather warms. Once there are no bats exiting the tube at sunset, you can remove the tube and fix the hole. Bats make good neighbors, but not good house guests. We can exclude them and both be happy! [Texas Parks and Wildlife logo and credits]

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