H5 Bird Flu Cases in Australia Signal Spread into Wildlife 2026

The recent detection of H5 bird flu in seven suspected greater crested terns on South Australia's Limestone Coast signals a worrying spread into Australian wildlife. Experts warn this may be evidence that the highly pathogenic avian influenza is taking hold in local bird populations.

New Suspected Cases in South Australia

Seven greater crested terns – a common seabird – were found dead or sick across three locations: Cape Jaffa, Southend Jetty near Beachport, and Port MacDonnell, just 20km from the Victorian border. One bird was found at Cape Jaffa, five around Southend Jetty, and one at Port MacDonnell. Of the five at Southend Jetty, four were sick and one was dead.

If confirmed by the CSIRO, these would bring the total cases in South Australia to 14, with 10 in local greater crested terns. Prior to this, the disease had been detected in subantarctic birds, which BirdLife Australia’s chief executive, Kate Millar, described as "embers" that have now ignited the "smoke" of local spread.

Comparison of Detections

Expert Warnings and Government Response

South Australia’s primary industries minister, Clare Scriven, called the development concerning, noting that all detections so far are in wild seabirds, not poultry. The state’s chief veterinary officer, Dr Skye Fruean, said it was too early to confirm a cluster at Southend Jetty. Samples are being analyzed by the CSIRO to determine whether the disease is spreading locally.

Kate Millar emphasized that governments have previously stated the disease had not spread – but this discovery provides clear evidence of spread into local wildlife. The situation is being monitored closely, with an emphasis on biosecurity for the poultry industry.

Key Takeaways

• H5 bird flu is now suspected in seven new wild seabird cases in South Australia.
• The disease has moved from subantarctic birds to local greater crested terns.
• Total suspected and confirmed cases in SA could reach 14.
• No poultry or agricultural detections have been reported yet.
• CSIRO testing will confirm if local spread is occurring.

FAQ

Stay updated on the H5 bird flu outbreak in Australia as experts continue to monitor the situation. The discovery in greater crested terns underscores the need for vigilance in wildlife surveillance and preparedness.