Theres a [censored] bat in my [censored] house

[Uglyowl]

On Tuesday night and Thursday a bat came into our living room (each time around 10:00PM) and flew around a few times and disappeared. I left some windows (and door) open for an hour to let it get outside and thought for sure it was gone until tonight.

I was completely unprepared to catch it. I need a plan:

1. Open window slightly tonight (low of 25 degrees tonight; will burn more oil). I will do this if it could help.

2. Hope it escapes on it's own or the cat gets at it once?

3. What materials should I have ready the next time to get it? Doesn't seem like it will be easy..those guys are fast and hard to see where they land.

4. Are there legal traps for these bastards?

Not very happy...Please help!