Australian authorities have confirmed the country's first mass mortality event linked to the H5N1 avian influenza virus. Aerial surveillance discovered 49 dead and 35 sick greater crested terns on Baudin Rocks, an island off the coast of South Australia. This development marks a significant escalation in the spread of the virus, which first reached Australian shores in June 2026. While the virus has now been detected in over 100 wild birds across five states, officials emphasize that there is currently no evidence of the disease in commercial poultry or agricultural systems.
Federal Agriculture Minister Julie Collins stated that while the event is distressing, it was an anticipated outcome as the virus establishes itself in the natural environment. The government has activated national response plans and increased surveillance to monitor the situation. Experts warn that because wild birds move freely across the continent, further mass mortality events are likely to occur. The primary focus remains on protecting the nation's agricultural sector and unique native wildlife from the highly contagious strain.
Despite the rapid spread among seabirds, the risk to human health is currently considered low. Authorities are urging the public to avoid contact with sick or dead wildlife and to report any unusual sightings to the Emergency Animal Disease Hotline. The government continues to work closely with the poultry industry to maintain strict biosecurity measures, ensuring that farms remain isolated from potential infection pathways. As the situation evolves, the priority is to contain the virus's impact on Australia's biodiversity and food supply chains.