Australia has recorded its first confirmed case of H5 bird flu in a local mammal, after a long-nosed fur seal tested positive for the deadly pathogen in South Australia. Federal Agriculture Minister Julie Collins confirmed the finding on Sunday, noting that the animal was discovered dead at Beachport, roughly 300 kilometres south of Adelaide, according to reporting by ABC News and Reuters.
Where the First Mammalian Case Was Found
The infected long-nosed fur seal was found dead with no signs of injury at Beachport, according to a statement from the South Australia Department of Primary Industry and Regions (PIRSA). A member of the public reported the animal via the Emergency Animal Disease hotline on August 19. State-based testing initially came back inconclusive before the positive H5 result was confirmed.
Federal Agriculture Minister Julie Collins stated that the detection does not appear linked to other sick or dead marine mammals in the area. Instead, officials believe the animal contracted the virus through exposure to infected wild birds or their shared environment. South Australia’s chief veterinary officer, Skye Fruean, explained that seals face high risks because they inhabit coastal rocky outcrops alongside dense populations of wild birds, exposing them to elevated levels of the virus.
National Case Counts and Regional Impact
South Australia currently holds the highest number of confirmed bird flu detections in the country with 194 positive events, contributing to a nationwide total of 298 cases since the outbreak began in June. Victoria has recorded 86 cases, Western Australia has logged 10, New South Wales has 11, and Tasmania has recorded nine, according to government figures.
Did you know? Australia was the last continent to report H5N1 bird flu. Prior to the mainland outbreak, the virus struck sub-Antarctic Heard Island in late 2025, where it killed over 13,000 baby seal pups, according to local media reports cited by Reuters.
Last week, South Australia reported three mass mortality events on remote offshore islands involving more than 1,000 greater crested terns. Additionally, South Australia Environment Minister Emily Bourke confirmed that a previously suspected case in a little penguin on Kangaroo Island has now tested positive.
Fears for Vulnerable Native Species
Conservation groups and wildlife officials have warned that the arrival of the virus in local marine mammals could trigger severe population declines. Invasive Species Council chief executive Jack Gough pointed to outbreaks in South America and Antarctica, where mammal-to-mammal transmission among seals led to soaring mortality rates, particularly among pups. Gough expressed specific concern for Australian sea lions, noting that fewer than 10,000 mature breeding adults remain, raising the specter of an extinction-level event for the species.
Minister Collins emphasized that once H5 bird flu spreads through the natural environment, preventing significant wildlife losses becomes impossible. However, the federal government maintains that no infections have been detected within poultry or agricultural systems, and the health risk to the general public remains low.
Frequently Asked Questions
What animal tested positive for bird flu in Australia?
A long-nosed fur seal found dead at Beachport in South Australia tested positive for the H5 bird flu strain, marking Australia’s first confirmed mammalian case.
Are Australia’s agricultural farms or poultry affected?
No. Federal Agriculture Minister Julie Collins confirmed there is currently no evidence of the virus in domestic poultry or agricultural systems.
What should citizens do if they spot a sick bird?
Authorities urge the public to report any sick birds to local officials and strictly avoid approaching or touching them.
How many total bird flu cases have been recorded in Australia?
As of late August, authorities have recorded 298 positive H5 bird flu events nationwide, with South Australia accounting for 194 of those detections.
Join the Conversation: What steps do you think wildlife authorities should take next to protect vulnerable native species? Leave a comment below or subscribe to our newsletter for ongoing updates on the bird flu response.
Worth a look