Poultry farmers across South Australia are tightening biosecurity measures following confirmation that the deadly H5N1 bird flu is now spreading among native wild birds.

Authorities have confirmed local transmission between greater crested terns, marking the first known spread of the virus within Australia’s wild bird population.

Farmers, particularly in the Robe region, are increasing hygiene protocols, restricting farm access, and monitoring flocks to prevent the virus from reaching commercial poultry.

Despite growing concern, officials say there are still no confirmed cases in Australia’s poultry industry, and the risk to the public remains low.

Authorities are urging the public not to handle sick or dead birds and to report any sightings immediately, while surveillance continues as Australia works to protect its poultry industry, wildlife, and food supply.