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

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

The Avian Influenza has claimed the lives of a Harbor Seal and a Chilean Flamingo at Chicago's Lincoln Park Zoo. The zoo announced they received results that confirmed the highly pathogenic Avian ...

Two animal deaths at Lincoln Park Zoo in Chicago have been traced to an outbreak of avian influenza, or bird flu, according to a statement from zoo officials on Wednesday. It also announced that ...

While health officials have insisted that the risk to the public remains low amid continued spread, the outbreak has passed ...

Lincoln Park Zoo said the specific source of the exposure of the animals to bird flu, or H5N1 virus, is not known.

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

Officials at Lincoln Park Zoo confirmed Wednesday that a harbor seal and a Chilean flamingo each died of highly pathogenic avian flu earlier this month. In a statement, zoo officials said the ...

Hundreds of red-breasted mergansers have been affected by a bird flu outbreak on Chicago's Lake Michigan shoreline, raising ...

Avian influenza is a respiratory virus that spreads quickly among birds, often through nasal and eye secretions and manure.

CHICAGO (CBS) -- Two animals at the Lincoln Park Zoo — a seal and a flamingo — died of bird flu last week, the zoo announced Wednesday. The Chilean flamingo, Teal, died Wednesday, Jan. 8.