SONOMA, CA - AUGUST 16:  USGS Biologist Science Tech Brooke Hill releases a Western Sandpiper after testing it for the highly pathogenic H5N1 avian influenza August 16, 2006 in Sonoma, California. Officials from the USGS are beginning to test migratory birds arriving from Alaska as part of a multi-million dollar nationwide effort to detect the highly pathogenic H5N1 avian influenza in migratory birds.  (Photo by Justin Sullivan/Getty Images)