Two weeks after scientists confirmed the first-ever outbreak of avian influenza, or bird flu, in elephant seals along the ...

After H5N1 bird flu was detected in elephant seals gathered at Año Nuevo State Park, other marine mammals have also succumbed, including a sea otter and sea lion. So far, only animals in San Mateo ...

Wildlife authorities confirmed Thursday that nine more elephant seals, a sea lion and an otter have died from bird flu at Ano ...

Scientists estimate more than 60 marine mammals may have been infected by the virus.

Research has confirmed that avian flu has been detected in both a dead southern sea otter and a dead sea lion.

The H5N1 bird flu outbreak in California elephant seals has spread to other marine mammals, including a sea otter and sea lion. But wildlife officials are hopeful the outbreak will remain contained.

The cluster of infections appears confined to an area of San Mateo County, and no cases have been detected at Point Reyes National Seashore.

Following news this week of a southern sea otter's death from avian flu, experts are now saying the disease's outbreak has infected more species of marine mammals along the San Mateo County coast.