Avian influenza viruses have been isolated from many species including humans, pigs, horses, minks, cats, marine mammals and a wide range of domestic birds. Some wildfowl, particularly shorebirds, ducks, geese and swans are thought to be the endemic carriers of high pathogenic avian influenza (HPAI) and low pathogenic avian influenza (LPAI) viruses. Many researchers have reported that Anatidea family from Anseriformes and wildfowl from Charadriiformes are the natural hosts of influenza A viruses.

This compilation introduces information concerning A virus infections in wildfowl.