MI trappin,
Definitely should look into the species you have, there's plenty of info on
their roosting habits and homeowners and clients often have questions that
you'll better answer with more info.
Most "foliage roosting" bat species are things that are used to bark coming
off and having to move fairly often, some when tracked move multiple moves
in one week when young aren't non volant (non flying).
Much of the up north house bats will be big brown or where not yet wiped out
little brown bats, both of which are the most common house roosting bats in
the country.
Doesn't mean there aren't some out in the trees but you would more likely see
increased issues from additional folks getting new roofing or siding than from what's
happening in "nature" with those two species.
People are more aware of bats during summer when active as they can see and often hear
then, along with more people being aware of bats in general due to white-nose syndrome.
People also tend to call even if they were not concerned previously when someone reports on
the local news about a rabies case. We get a spike every time that happens.
I hope folks are using good maternity season black outs for exclusion. We still get operators
especially pest control calling to ask us in June and July and August if they can seal bats out
when we are in clear pup season still. No good! Not for national reputation of our industry and
certainly not for bats or usually the client who ends up with fall out.
Bat exclusion is a good business line and when done properly at the proper times of year can
resolve issues for the homeowner without jeopardizing bat conservation.