This is somewhat related to caves, as bats are often reliant on abandoned mines where caves are not abundant. Science North just released a new video in multiple formats, 23mb to 472mb, English and French, free for copying and distribution. Disclaimer: I have a small part in the video. Please help spread the word to anyone you might think will benefit from this. Thanks!
http://vimeo.com/motionarcstudios/review/55887106/116b8f5305
