Bert,
We have lots of bats around here, too. We often see them flying around at night, diving for bugs over the pool. That is not too bad, but in the house and coming at you is a different story. It is unusual (but not rare) for them to get into an attic or dormers, and generally calling animal control at the health department is the way to go.
Not to throw gasoline on the flames, but
here is an article from today's Baltimore Sun.
