Bird flu has decimated poultry flocks and infected cattle herds. The risk to humans is currently low, but that could easily change as influenza can rapidly change.

While it's tragic and alarming to see a massive die-off, it's not uncommon for birds that travel in such large populations.

Monitors with a bird tracking organization say hundreds of ducks have succumbed to bird flu along Lake Michigan.

Dozens of dead and sick birds are washing ashore on Lake Michigan beaches in Illinois and Wisconsin, suspected of having the bird flu, according to state officials.

The small plastic particles are "ubiquitous" in Great Lakes water, sediment, plants, fish and beaches, an international panel ...