Officials say it is the first time this has happened in California, and are raising the alarm amid concerns the virus could mutate to be better able to infect humans.

Highly pathogenic avian influenza H5N1 is estimated to have killed at least about 52,000 seals and sea lions across South America, based on published scientific tallies of the 2023 outbreak and its ...

A Waste Management truck carrying ducks put down due to bird flu outbreaks rolled into a ditch Friday morning on U.S. 33 in ...

Since 2022, avian influenza has affected around 200 million birds in over 2,100 flocks across the United States. Around 11.6 million Wisconsin birds have been infected in the ...

People are encouraged to avoid sick or dead animals on beaches.