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

The infected birds "present with tremors and little ability to move," said a local conservation group tracking the outbreak.

Hundreds of dead or sick red-breasted mergansers have been found along Lake Michigan, sparking bird flu concerns.

The Milwaukee County Zoo has closed its Herb and Nada Mahler Family Aviary as a precautionary measure against avian influenza ...

As it mutates, the bird flu has seemingly been able to infect other bird species, pets, other kinds of animals and, on rare ...

H5N1 bird flu — have been found along the shores of Lake Michigan in the Chicago area, prompting warnings from area health ...

CHICAGO - The avian flu outbreak that has killed millions of chickens nationwide, driving up the price of eggs, is now ...

The largest concentrations of sick mergansers were found Saturday at North Avenue Beach and Oak Street Beach. Other birds ...

Reports of dead birds washing up on beaches along Lake Michigan are sparking new fears over bird flu. Over the weekend, ...

Where has bird flu been reported in Illinois? Are my pets at risk? Should I still be eating eggs? Here’s what to know about the avian flu outbreak.

Monitors with an area bird tracking organization say that they've determined that a number of ducks have succumbed to bird flu​ along Lake Michigan.