Fur seal’s death marks first Australian mainland mammal fatality from spreading H5 bird flu strain

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Key context: <p>Seal found dead at Beachport in South Australia presages ‘significant losses’, minister warns</p><ul><li><p><a href="https://www.theguardian.com/australia-news/live/2026/aug/23/australia-news-live-anthony-albanese-sydney-swans-police-investigation-alan-jones-antisemitism-inquiry-icac-nsw-liberals-ntwnfb">Follow our Australia news live blog for latest updates</a></p></li><li><p>Get our <a href="https://www.theguardian.com/email-newsletters?CMP=cvau_sfl">breaking news email</a>, <a href="https://app.adjust.com/w4u7jx3">free app</a> or <a href="https://www.theguardian.com/australia-news/series/full-story?CMP=cvau_sfl">daily news podcast</a></p></li></ul><p>A long-nosed fur seal has died from H5 bird flu in South Australia, marking the first confirmed case in a mammal on the Australian mainland.<br><br> The seal was found dead at Beachport on Wednesday on the state’s Limestone Coast.<br><br> It marks a fresh escalation in the spread of the virus days after the South Australian premier, Peter Malinauskas, <a href="https://www.theguardian.com/world/2026/aug/20/more-than-1000-birds-found-dead-in-three-mass-mortality-events-amid-significant-h5-escalation-in-australia">announced three mass mortality</a> events on offshore islands involving more than 1,000 greater crested terns.</p><p>The federal agriculture minister, Julie Collins, said the seal death was “not unexpected” as the virus begins to spread through the country.</p> <a href="https://www.theguardian.com/world/2026/aug/23/fur-seal-death-first-australian-mainland-mammal-h5-bird-flu">Continue reading...</a> This development from The Guardian highlights ongoing changes in the sector.