Bird flu follows avian flyways
Deadly H5N1 influenza travels with migrating wildfowl
![Ruddy shelducks](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/12/ti_14-05216-large.jpg?fit=860%2C460&ssl=1)
ON THE WING Ruddy shelducks (Tadorna ferruginea) and other wild birds may spread the deadly H5N1 virus along their migration routes in Asia.
Courtesy of Chao Zhao