Growing up I lived in a house where bats inside were a regular occurence in most of the houses on the street one summer. The preferred method was to swat them with a tennis racket, or even better, with (groan)a bat-minton (LOL) racket. Actually the latter being lighter made for a better tool. The impact would stun the bat, and it could quickly be scooped up into a wastebasket, and set free outside.
Growing up in Santa Fe, we would get bats in the house a couple of times/year. We'd just catch it in a bird net and let it go outside.
Bats are good, they eat insects.
You can buy a bird net at a petstore.
My photoblog http://dragons-fly-peacefully.blogspot.com/
Bacchetta Giro (recumbent commuter)
Bacchetta Corsa (recumbent "fast" bike)
Greespeed X3 (recumbent "just for fun" trike)
Strada Velomobile
I will never buy another bike!