Australia confirms first mass bird‑flu mortality among seabirds

H5N1 bird flu mass mortality greater crested tern South Australia

Australian authorities announced the country's first mass mortality event linked to the H5N1 bird‑flu virus, with about 50 greater crested terns found dead and 35 sick on rocks off Cape Jaffa in South Australia. Laboratory tests confirmed the presence of H5N1 in the birds, marking the first confirmed large‑scale wildlife loss from the virus in Australia.

The outbreak brings the national tally to 74 confirmed H5N1 cases across Western Australia, South Australia, New South Wales, Victoria and Queensland. Officials said no infections have been detected on poultry farms, and the risk to human health remains low. The federal government has allocated an additional AU$24 million for response measures, on top of earlier AU$113 million funding, and warned that further spread among wildlife is expected.

Australia and New Zealand had prepared for the virus for years, tightening biosecurity, testing shorebirds and vaccinating vulnerable species. The situation mirrors large‑scale die‑offs seen elsewhere, where H5N1 has killed hundreds of millions of birds worldwide and caused billions of dollars in losses to the poultry sector.

Entities: Cape Jaffa · Greater crested tern · H5N1 avian influenza virus · Jack Gough · Julie Collins · Murray Watt · Skye Freuan · South Australia

Claims

What the coverage asserts, and how well corroborated each claim is across sources.

[● 7 SOURCES] Australia has recorded 74 confirmed H5N1 cases across Western Australia, South Australia, New South Wales, Victoria and Queensland. (official tally)
[● 9 SOURCES] Australia experienced its first confirmed mass mortality event among wild seabirds due to H5N1, with about 50 greater crested terns dead. (mass mortality event)
[● 5 SOURCES] New Zealand reported its first H5N1 case the month before the Australian outbreak. (regional reporting)
[● 7 SOURCES] No H5N1 infections have been detected on Australian poultry farms. (farm surveillance)
[● 6 SOURCES] Globally, H5N1 has killed hundreds of millions of birds and caused billions of dollars in losses to the poultry industry. (global impact summary)
[● 2 SOURCES] The Australian government allocated an additional AU$24 million for bird‑flu response, on top of earlier AU$113 million funding. (government funding announcement)
[● 8 SOURCES] Testing confirmed H5N1 in 49 dead and 35 sick greater crested terns at Cape Jaffa, South Australia. (laboratory confirmation)
[● 6 SOURCES] Risk to human health from the H5N1 outbreak in Australia is assessed as low. (public health assessment)