Doesn’t make a lot of sense. Bats aren’t free flying like birds. They gather....barns, houses, caves...
... and other crevices in buildings.
A few years ago, up the street from me was an impressive bat colony. Its location was in a crack between two commercial buildings, right behind a well-lit billboard. That illuminated billboard attracted plenty of flying insects every night, and the bats had a feast.
I suppose someone thought the bats were a nuisance and called an exterminator, and now... no more bats.
Don't know where you got that idea, but it is quite wrong. Bats are indeed 'free flying like birds.' They fly where they want to and when they want to. They fly where they can find insects to eat, and just like birds fly to where they can find things to eat. Both bats and birds fly within a somewhat restricted area near where they call home. Both bats and bird migrate - to a greater or lesser degree depending on which species they happen to be.
I've observed may bats where I work, and in nearby mountainous areas where they live. They are often quite playful in the air, often sparing with their fellow flyers, usually when they are leaving 'for the hunt.'