Even after 5 years of installing a bat house on supposedly a sunny
morning spot, I've never spotted a bat using it. Early this morning,
Debbie spotted a bat sleeping on our tree near the bedroom...right out
in the open at eye level! And it was on the northwest side of the tree
which wasn't where we would have expected it. The head is pointed
downward in these two photos.
Bats are great for killing mosquitoes if you wonder why encourage them.