Highly pathogenic avian influenza (HPAI) H5N1 Eurasian variant (bird flu) has been detected in domestic and wild birds in multiple states within the Atlantic and Mississippi Migratory Flyways (a migratory flyway is the flight path used by birds between their breeding grounds and their overwintering sites).
Most wild birds found with this virus are waterfowl that typically show no signs of illness but may play a role in spreading the virus to other birds, including domestic and wild species. Domestic poultry such as chickens, quail, pheasants, guinea fowl, and turkeys can become seriously ill from HPAI with a mortality (death) rate of 90% or higher.
Source : upenn.edu