Mass bird deaths from H5 in Australia
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The gist
More than 1,000 crested terns found dead in South Australia, presumed killed by H5N1 bird flu.
The outbreak threatens native wildlife and prompts vaccination plans for endangered species.
Background
Australia is experiencing its first H5 bird flu outbreak, which has caused mass mortality events in wild birds. The virus, a highly pathogenic strain of H5N1, has been spreading globally for decades and has now reached Australia, killing seabirds and raising concerns for vulnerable species like little penguins.
How it unfolded
- Aug 14, 2026CSIRO identified Australia's first H5 bird flu mass mortality event in South Australia.
- Aug 15, 2026First Australian death of a little penguin with H5 bird flu confirmed on Victoria's Phillip Island.
- Aug 18, 2026Hundreds of dead birds reported in Portland, Victoria, with fears of H5N1 link.
- Aug 20, 2026South Australian premier announced more than 1,000 crested terns found dead on remote islands, presumed H5N1.
Who’s saying what
- Official
- Premier Peter Malinauskas said the deaths were detected through comprehensive surveillance and urged the public to report sick or dead birds.
- Public
- Residents in Portland, like Kate Howman, expressed distress over seeing dying birds and called for a stronger government response.
Still unverified
The cause of death for the crested terns is presumed H5N1 but not yet confirmed; tests are ongoing. A suspected case in a little penguin from Kangaroo Island is also under investigation.