Like the bees afflicted by Colony Collapse Disorder, which has wiped out 90% of them in parts of the U.S., bats in the Northeast are dropping off by the thousands.  The ones remaining, they say, are too emaciated to last the winter.  A white fungus around the nose is the mark of their mysterious condition. 

See:  http://todayinscience.wordpress.com/2008/02/24/mystery-deaths-in-bats-similar-to-colony-collapse-disorder-of-bees/