A bat’s body is covered completely with hair and they tend to have rather large ears. Bats use their ears to help them detect the location of objects around them or to locate insects flying through the air. Depending on the species, an adult bat can weigh less than 1 oz. up to 3 lbs. Bats have two wings, consisting of a double membrane stretched across their elongated fingers and arm bones, which are their primary way of getting around. They have four limbs, two legs and two arms with the same bones as human hands modified as part of their wings.
Bat-proofing a structure is the best way to prevent an infestation and the best time to bat-proof is after bats have left for their hibernation periods in the autumn. Attempting to bat-proof at any other time raises the possibility of boxing in babies who will then look for other parts of the house to escape to. At dusk, homeowners should inspect the exterior of the home and observe where bats enter and exit. Common access points include attic louvers and under facia boards. It is recommended that homeowners seal any cracks or crevices with caulk and steel wool. Pay special attention to holes in the structure that lead to dark secluded areas, like attics and belfries. Also, screen attic vents and openings to chimneys, and install door sweeps. Exclusion is the only method to keep bats out long term.