Question: are bats in the belfry?
Answer: What's the origin of the phrase 'Bats in the belfry'? Bats are, of course, the erratically flying mammals and 'belfries' are bell towers, sometimes found at the top of churches. 'Bats in the belfry' refers to someone who acts as though he has bats careering around his topmost part, that is, his head.