Well I have heard of ‘bats in the belfry’, but never imagined ANYTHING like that. What on earth would attract so many bats to a tile roof??
I had a house with a huge open attic, and they got in to there. They loved it. It was dark, sheltered, and perfect for them. I did not bother them and they left me alone. After a while I noticed they were gone so I fixed the window that they were going in and out of. No I don’t know how many there were but it was only a few. Hugs