I made a bat house about 2 months ago
Unfortunately, the site where I got blueprints from no longer works
The bat house is on the south side of a large tree behind our house, about 4-5 meters high. No occupants yet, though. I've seen a random bat fly over our house every now and then, but it's hard to tell how often they show up since we rarely sit outside after dark (mostly because of mosquitos, which means the bats aren't doing their job!). I read somewhere that bats spend the winter in caves, bunkers, attics, etc., but during the summer look for places closer to feeding grounds. It was implied that they find their summer hangout in the spring and don't move until autumn, but I'm not sure if this is true for all bat species.