Fig. 2.

Surveillance sites for avian influenza viruses in wild aquatic birds in North America, 2014–2015. The surveillance focused primarily on the Mississippi flyway (3, Minnesota; 4, Wisconsin; 5, lowa; 6, lllinois; 7, Missouri; 8, Arkansas; 9, Mississippi; 10, Texas; 11, Louisiana; and 13, Ohio), but also included 1, Alaska; 2, Alberta, Canada; 16, Delaware Bay, New Jersey; 14, Pennsylvania; 15, Maryland; and 12, Florida. Samples collected were tracheal and/or cloacal swabs of trapped or hunter-harvested birds or fecal (environmental) swabs. The species of migratory ducks tested are specified in Materials and Methods.