USDA. Animal and Plant Health Inspection Service.
Avian influenza, or "bird flu," is a contagious viral disease of domestic and wild birds. It's a major threat to the poultry industry, animal health, trade, and the economy worldwide. Provides information how to report signs of animal disease, current status and information for controlling avian influenza.
See also: Detections of Highly Pathogenic Avian Influenza for up to date information