Natterer studied engineering, got married, travelled widely, and had a successful career as an electrician but was suddenly stricken with delusions and anxiety attacks.
Slipping up and down the octaves, from a low drawl to a hyperventilated squeal, it's jarring, ethereal intensity doesn't prepare you for a natural natterer.
Officials at the church have battled against the problem for a decade as hundreds of whiskered, pipistrelle, natterer and brown-long eared bats made the church their roost.
