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

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

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

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.

Roughly 200-300 ducks have been found dead in Chicago and the northern suburbs around Lake Michigan in recent days, according ...

A more dangerous strain of H5N1 bird flu has been detected in cattle for the first time, the US Department of Agriculture ...

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

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

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

In an announcement, the zoo said the closure "is out of an abundance of caution meant to protect our avian population from ...

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.

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