Southeastern states: In this region of the country you will probably find the little brown and the big brown bats plus they do use artificial roosts or bat homes. Almost any bat that lives in cracks, old buildings, attics or under bridges will likely reside in a bat house. Again as in the previous article on attracting bats you are able to paint the bat home black or a dark color in this section of the country and face it to the south-southeast to keep it warm.
Northwestern States: Some of the frequent bats are the same here. Because of the generally colder temperatures you should paint the exterior of the bat houses a darker color for heat absorption.
Northeastern States: You can leave the house a natural wood or paint it white with a non-toxic latex paint. Again roosts placed on buildings or sticks are more likely to be occupied first and should be filled by the next summer and then move it to some other location. In such states you’re very likely to see the Southeastern bat, Day Bat, Big Brown as well as the Mexican Free-tailed.
Southwestern countries: In the Southeast some bats favor total sunlight, others like some shade and others complete shade. The most frequent bats in this area are the Mexican Free-tailed, Big Brown, Little Brown and some different species that I can’t find definite conformation on artificial roost usage.
Bat occupancy changes and here are a couple of statistics to demonstrate why we need patience. In some surveys bats occupy about 60% of all types of roosts. Bats are always looking for roosts and are experts at discovering all kinds of shelters while they’re foraging at night, Bat Removal is always an option. Bat houses on sticks or buildings are less difficult for them to locate and are occupied 2- 21/2 times faster than put in other areas. 90% of those artificial homes are occupied for the first 2 decades , the remainder took from 3-5 decades. Multi chambered houses seem to work best. Maintain your bat houses every year, DO NOT Use insecticides or poisons because they will kill the bats and the babies. Verify the homes for seal and cracks up for their use another year and good luck on your bat homes.