http://www.livescience.com/16738-fungus-killing-bats-study-proves.html
This posting comes a little late, but in October a study found that the disease responsible for millions of bat deaths is caused by a fungus, and a fungus alone.
This was named one of the top ten wildlife news stories of 2011, also of note is that congress recently approved $4 million dollars towards white nose syndrome research.
http://www.caves.org/WNS/Congress%20Approves%204M%20in%202012.pdf