What's Causing Bats to Drop Like Flies?

People near Albany, N.Y., began noticing the strange bat behavior at least two years ago: Droves of the normally nocturnal mammals were seen flying around on brisk winter days when they should have been hibernating in caves for the season. The state's Department of Environmental Conservation (DEC) teamed up with the U.S. Geological Survey (USGS) to investigate and made an alarming discovery: Bat populations throughout northeastern New York State, Connecticut, Maine and Vermont had thinned by as much as 97 percent in area bat caves and emaciated survivors were found hanging near cave entrances where it is typically too cold for them to stay the entire winter. The only clue to the mysterious phenom was a white, powdery organism on the muzzles, ears and wings of the dead and dying bats. [More]

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