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

A version of the H5N1 virus that has killed one person and severely sickened another has been detected in milk samples ...

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

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

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

Officials urged residents of the Chicago area not to touch -- or let their pets touch -- dead or sick birds as a bird flu ...

Wildlife professionals and advocates are grappling with an avian influenza outbreak that seems to be growing more virulent ...

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

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

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

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.