But wild birds are not the cause of an outbreak.
The cause of this outbreak was a prize cockfighting rooster that had VND coming in from Mexico.
Then large backyard bird flocks, cockfighting rings and their transient nature, freeranging of infected birds (like not in a backyard, meaning from property to property with no fences) and infected birds being moved all are the major contributors to this problem.
During an outbreak, limiting exposure to wild birds is only about trying to mitigate that variable. Mostly about infected poultry not giving it *more* to wild birds so they can pass it on more.