Not all bats eat mosquitoes, unfortunately. We've got several kinds here but the most common is a fruit bat. I wish I knew how to encourage the bug bats and not the fruit bats. The fruit bats fly into our terraces, suddenly seem to realize there is a wall ahead of them and empty all ballast while making that 180° turn. That stuff is very, very difficult to remove from the walls. We have an enormous banyan (fig) tree on the wall behind the house and several other fruit trees nearby. Plus, they come down for water from my ponds. I don't begrudge them the water or the fruit but I wish they wouldn't leave the guano on my wall. Friends have told me to put a red light on the terrace at night, apparently the bats don't like red lights. There is a joke there somewhere but I'm not going to look for it
