Bat House - by OBC
There are Bat Houses of many shapes and sizes but one claims to be the best design, most researched and the most popular with bats. Not all bats will occupy a bat house. Many in the western US will, if the timing is right and other conditions such as design and location are suitable. A bat house provides protection, warmth and a place to roost during the summer.
Plan for a bat house.
Having a bat house in your yard is one way to attract bats. Having two or three is better. After they come out of winter hibernation, bats look for a summer home. If the bats see your bat house, and like it, there is a good chance they will make it their roost. A house like the one shown can accomodate 20 or more bats. There are many bats in Williams but I beleive there are about four that roost nearby our home. They have not moved into my bat house as yet. It has only been up for a short time.
A few tips when building your bat house are:
Make it as natural looking as you can.
Caulk all wood joints above the vent gap to keep the warm air in.
Use glue and galvenized screws for fasteners.
Use 1/8" rain gutter plastic mesh as a roosting surface, stapled in place.
Attach your bat house to a post at least 15' high.
Locate it in a flight path area clear of interfering trees, etc.
Face it toward the south or south-east so it will warm in the morning sun.