"Some of the Louisiana birds will be tested by the National Wildlife Health Center run by the U.S. Geological Survey. But a USGS spokesman told The Baton Rouge Advocate that USGS records showed 16 incidents in the last 30 years where more than 1,000 blackbirds have died all at once. “These large events do take place,” he said. “It’s not terribly unusual."

More birds fall from sky — this time in La. - U.S. news - Environment - msnbc.com