A potential bird flu infection in a fox raised anxiety of long-distance spread. Australia has just 12,000 sea lions left, and scientists cautioned that carnage may await Australia's remaining 12,000 sea lions as bird flu gains ground.

An expert explained that backyard bird feeding could become a bird flu superspreader. The suspected infection in a fox fueled alarm about long-distance transmission. Scientists cautioned that devastation may threaten the remaining 12,000 sea lions in Australia as bird flu expands across animal types.