They seem to prefer their houses to mine. First noticed a few bats in 2010 living in the eaves of our house. Not the attic. Put up the first two bat houses early spring of 2012 and within a few weeks the bats had moved into the closest of the two bat houses. Less than a foot away from where they had been. Had two pole mount bat houses for years with no luck. One of them had a few visitors and the other was never used at all. About three years ago moved both, as well as a new one, to the beside the two occupied ones.