A few evenings ago at my sister's house (I was sleeping in the finished basement) I was startled by a very large bat.  It flew into the enclosed laundry area so I shut the door.  And we had not seen it since.

I talked to my sister about it and she likes the bat.

They've had a few in the basement and when her husband kills one of them, she starts seeing bugs in the basement.  When there's a bat, it eats the bugs.

She says, "Better the bat I can't see than the bugs I can see".

But then...I like bats.  Bats are the good guys.  One bat in one night will eat a whole grocery bag full of mosquitoes.