I have bats. I don't have a belfry, but I do have cathedral ceilings and from the hightest point Chuck and I decided to hang a triplet of chandeliers.
This is where the bat or bats hang out.
I never see the culprits only their droppings under the chandeliers and the occasional butterfly wing or grasshopper leg. And the mess on the arms of the chandeliers.
I don't mind the presence of the bats so much; what I do mind is the mess on the floor and if one does not get to it in time, it is darn near impossible to get rid of. That part I mind because it forces me to houseworky things not necessarily on my schedule which is, to be frank, not very often.