A long-nosed fur seal found at Beachport on the Limestone Coast of South Australia has been confirmed as the first mammal on the Australian mainland to die from the H5 bird flu virus. The discovery follows a series of recent outbreaks affecting local wildlife, specifically three mass mortality events involving over 1,000 greater crested terns on offshore islands.

Federal Agriculture Minister Julie Collins addressed the incident, stating that the death of the seal was "not unexpected" as the virus continues to circulate within the region. The event represents a significant development in the spread of the H5 strain, which has been monitored closely by authorities following the initial bird outbreaks. While the virus has now crossed into a mainland mammal, officials are continuing to assess the impact on local ecosystems and the potential for further transmission. The situation remains under observation by state and federal agricultural departments as they coordinate responses to the ongoing avian influenza presence.