How would avian influenza enter Australia?
Wild waterfowl have been known for some time to be a natural reservoir of AI viruses. Migratory birds (especially waterfowl or sea birds) could potentially carry the AI virus into Australia. However, domestic poultry must then have direct contact with their contaminated secretions or droppings to become infected. The common migratory bird species coming to Australia are not the main reservoir species for AI viruses.