Here a a few media stories on WNS. The audio interview with WVDNR's Craig Stihler is very good and informative. He has a style that is concise, yet informative.
Article "Hope Fading for WV's Bats":
http://wvmetronews.com/outdoors.cfm?func=displayfullstory&storyid=51183
Direct audio link:
http://mediaserver.citynet.net/metronews/Stihler-1.wma
This Internet piece has a couple of very interesting sidebars, particularly the one on estimating bat and other wildlife populations:
http://www.earthisland.org/journal/index.php/eij/article/flying_blind