MSNBC: Some 500 dead and dying birds fell onto a Louisiana highway on Monday, just three days after a similar incident in Arkansas.
The events have led to speculation running from poisonings to "End of Days" scenarios, but a key federal agency emphasized that mass bird die-offs are not that rare.
Most of the birds found on Louisiana Highway 1 near Point Coupee were red-winged blackbirds, as was the case in Beebe, Ark., some 360 miles away.
The species is one of the most common in the United States, with a population estimated at up to 200 million.
Some of the Louisiana birds will be tested by the National Wildlife Center run by the U.S. Geological Survey.
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