The sources of exposure are unclear, but officials said it was almost certainly from contact with an infected waterfowl.

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

Testing has confirmed that HPAI was the cause of death for Teal, a Chilean flamingo chick, on Jan. 8; and Slater, a harbor seal, on Jan. 9, according to a news release. These are the first known cases of the virus at this zoo.

A pair of “amazing animals” — a harbor seal and a Chilean flamingo — have died of bird flu at the Lincoln Park Zoo in Illinois, officials say. Their deaths came within a day of each other, the Chicago zoo said in a Jan.