Bird flu infects many species, including wild animals, according to the United Nations. Ducks, quail and at least one eagle have been euthanized due to the virus. A global outbreak of H5 bird flu has infected millions of animals since 2020. The virus can infect chickens, cows and, more rarely, humans.

With so much H5N1 circulating in the U.S., scientists worry we are a few mutations away from a potential human pandemic.