I would like a bat house, because we get these little microbats on our back verandah.
Find them in the day just sleeping on the deck, they look dead, but then they leave at night.
And sometimes at night they fly into the house and you have to chase them out.
Beats fruit bats though. Those things carry some some bad viruses and you don't want to get bit or scratched by one. Also their shit will eat the paint off your car if you don't get rid of it quick enough.