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Aussie scientists suspect H5 bird flu outbreak in Heard Island

The H5 bird flu strain was confirmed after high elephant seal deaths, prompting a $100 million government investment in preparedness and ongoing monitoring.

  • On Heard Island, Australian scientists confirmed H5 bird flu in southern elephant seals after collecting samples during an Australian Antarctic Program voyage Earlier this year.
  • Scientists suspected an outbreak after unusually high elephant seal deaths prompted sampling Earlier this year, and researchers said H5 bird flu was expected given its presence on nearby sub‑Antarctic islands and Antarctica.
  • CSIRO's Australian Centre for Disease Preparedness confirmed H5N1 high pathogenicity avian influenza in samples, and observers reported no impacts on penguins and seabirds despite high southern elephant seal mortality.
  • The federal government announced it would invest more than $100 million in preparedness, with Ms Collins saying the detection on Heard Island reinforces Australia's focus on outbreak readiness.
  • The detection reinforces urgency to protect threatened species and priority biodiversity across Australia, as H5 bird flu has spread across the US, Europe, Asia and Antarctica, causing deaths in wildlife across multiple continents.
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Avian influenza has been detected at three farms in Overijssel and Limburg. In Tienray and Helden, Limburg, the outbreak affects farms with 185,000 broiler chickens and 85,000 laying hens. In Bornerbroek, Overijssel, the outbreak affects 18,000 broiler chickens. The animals on the farms are being culled to prevent further spread of the disease. Transport of chickens and eggs is prohibited within a 10-kilometer radius of the farms, also to preven…

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ABC Australia broke the news in Australia on Tuesday, November 25, 2025.
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