Here are some resources to use for reports:

Photographs: Bat Conservation Int. www.batcon.org has a close relationship with Merlin Tuttle who has the best collection of bat photographs. Their magazine archives is a good source of images.

Echo the Bat story book by NASA:
http://imagers.gsfc.nasa.gov/echohome.html

Flip Book

Bat Houses

List of Bat Species

The flight of batss

Echolocationolocation

Austin, Texas' Congress Avenue Bridge: The largest colony in the US.