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Australia confirms first H5N1 bird flu in mammal

8/23/2026

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Story summary
  • Australia confirmed its first H5N1 bird-flu case in a mammal, a dead long-nosed fur seal.
  • The seal was found on Beachport, about 310 km southeast of Adelaide, with no injuries.
  • South Australia reported three mass-mortality events killing over 1,000 greater crested terns on offshore islands.
  • The government began vaccinating little penguins on Phillip Island and is considering broader wildlife vaccination.