Australia reports first suspected mainland H5 bird flu case

A brown skua sickened in Cape Le Grand National Park has put Australia on alert for its first suspected mainland H5 bird flu case, a finding that could end the country’s status as the only continent free of the strain if tests confirm it. The bird was found near Cape Le Grand Beach on June 14, taken into care, isolated for treatment and died the same night, according to Western Australian reporting.

Authorities said further testing was underway to determine whether the bird carried H5 bird flu. A second sick bird, identified as a giant petrel, was also being tested. Jackie Jarvis, Western Australia’s agriculture minister, said officials were taking the case seriously as agencies moved to contain any possible spread in the remote parkland east of Esperance.

The stakes extend well beyond one dead seabird. Australia’s federal bird flu guidance says the country is the only continent free of the H5 strain unless this suspected detection is confirmed. The Australian Government Department of Agriculture, Fisheries and Forestry has warned that H5 has caused severe disease and high death rates in poultry, wild birds and affected mammals, while Wildlife Health Australia says the virus has affected more than 500 wild bird species and more than 80 wild mammal species worldwide.

That global toll is why a single case in a brown skua matters for food supply, wildlife management and biosecurity policy. If H5 is confirmed on the mainland, the response would need rapid coordination across state and federal authorities, wildlife specialists and agriculture agencies to protect poultry flocks, manage the risk to native species and reduce the chance of spillover to people who handle infected birds.

Australia has spent years preparing for this possibility. The federal government said it is investing more than $100 million to prepare for H5 bird flu, including $35.9 million for environmental preparedness and protective action, plus another $7 million through the One Health Surveillance Initiative for surveillance and preparedness. The Western Australian Department of Primary Industries and Regional Development has also warned that a contagious H5 strain spreading globally could cause widescale death of poultry and wildlife if it arrived.

Officials have urged the public to avoid contact with sick or dead birds and to report suspected cases through the Emergency Animal Disease Hotline. The warnings reflect a simple reality: Australia has long been treated as a last geographic holdout against H5’s global advance, but the next test results in Western Australia will show whether this is an isolated wildlife event or the start of a far more consequential biosecurity challenge.