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USGS map of reported mass bird deaths 2000-2010

Points on the map represent mortality events reported to the USGS National Wildlife Health Center (NWHC) that involved more than 1,000 dead birds from 2000-2010. This is not meant to indicate all mortality, only those reported to NWHC.

Read the story: Dead birds, fish kills prompt doomsday theories, but scientists say they're natural

Map courtesy of USGS National Wildlife Health Center

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