Elephant seal numbers drop after avian flu outbreak: First report of transmission between marine mammals

The sounds of barking elephant seals are again in the air along the breeding grounds of Península Valdés, Argentina—but it's quieter. Almost exactly a year after a massive outbreak of H5N1 highly pathogenic avian influenza killed more than 17,000 elephant seals, including about 97% of their pups, scientists estimate that only about a third of the elephant seals normally expected here returned.