The National Fisheries and Agriculture Service of Chile has reported finding 3,350 dead sea lions, 16 marine otters, 15 porpoises and 11 Chilean dolphins in addition to close to 1,000 Humboldt penguins.  The number of dead marine mammals is over 2,400 percent higher during 2023 to date compared to the corresponding period in 2022. Mortality is attributed to H5N1 avian influenza virus. The recorded losses do not include species not considered at risk including pelicans and numerous species of marine birds.

There is concern over the endangered Chilean dolphin that inhabits the southern coast of the Nation.  It is estimated that ten percent of the remaining population of 10,000 Humboldt penguins have died of avian influenza.

Chile has reported numerous outbreaks of avian influenza in commercial and backyard flocks and has documented two cases in humans.