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.

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

Their deaths came within a day of each other, the Chicago zoo said in a Jan. 15 news release. Teal, a months-old Chilean flamingo, died Jan. 8 and Slater, a 7-year-old harbor seal, died Jan. 9.

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

The Chilean flamingo, named Teal, hatched last fall and died Jan. 8. The 7-year-old harbor seal, named Slater, died the next day. Zoo officials say it was “near certain” that the disease derived from contact with a waterfowl that was infected with the virus.

A Chilean flamingo and a harbor seal at Lincoln Park Zoo have died from avian influenza, or bird flu, zoo officials confirmed on Wednesday.