[MD_Willington_1976]

Cross reference all the migratory bird routes...

NA & SA

http://www.npwrc.usgs.gov/resource/othrdata/migratio/routes.htm

Storks in Asia
http://www.gisdevelopment.net/aars/acrs/2000/ts11/glc004.shtml

Migratory Birds and Spread of West Nile Virus in the Western Hemisphere
http://www.cdc.gov/ncidod/eid/vol6no4/rappole.htm

Once it hits the shores, who knows...

[Judith Anne]

bump to myself.