http://www.nytimes.com/2011/08/13/us...SPASS_BRF.html
I thought this was kind of weird. There's a video of this bat flying back and forth on this Delta flight from Wisconsin to Georgia.
http://www.youtube.com/watch?v=WXLnJYjL2OE
Apparently, the bat escaped. They don't say how the bat got onto the plane in the first place. Must have slipped past security.