In an announcement, the zoo said the closure "is out of an abundance of caution meant to protect our avian population from HPAI, commonly known as Avian Influenza, after recent, suspicious bird deaths on the Chicago shores of Lake Michigan."

The Milwaukee County Zoo has closed its aviary for the "foreseeable future" in an attempt to protect its birds from the bird flu.

The zoo has closed its farmyard and outdoor aviary after a deceased Cotton Patch goose was found to have bird flu.