At the risk of alarming folks even more, I offer here a listing of wildlife mortality reports across the nation, compiled by the U.S. Geological Survey.
Notice it stretches back to last spring. If you burrow down on this website, you'll see that the USGS totes up wildlife mortalities on a quarterly basis, going back years. There's also a map here of recent wildlife mortality events reported across the world.
For those who think recent reports of birds and fish dying are signs of the end of the world, folks at the USGS wildlife health center in Wisconsin told the Associated Press that dozens, hundreds and even thousands of birds, bats and other animals are found dead fairly often, and it's been happening for some time. Many are from disease, some from pollution, but some are unexplained.