Bird flu has claimed its first Australian sea lion and dolphin. How does the virus get into these animals?
Highly pathogenic H5N1 bird flu has been confirmed as the cause of death for an Australian sea lion, marking the first such case in the country. Scientists are investigating how the virus, which has already impacted marine mammals globally, is spreading to these endangered populations.
Why it matters
The spread of H5N1 to marine mammals poses a significant threat to biodiversity and raises concerns about the potential for further viral mutation and cross-species transmission.
Stephen Frink/Getty Bird flu has claimed its first Australian sea lion and dolphin. How does the virus get into these animals? Published: September 15, 2026 4:13pm EDT https://theconversation.com/bird-flu-has-claimed-its-first-australian-sea-lion-and-dolphin-how-does-the-virus-get-into-these-animals-291871 https://theconversation.com/bird-flu-has-claimed-its-first-australian-sea-lion-and-dolphin-how-does-the-virus-get-into-these-animals-291871 Link copied Share article Share article
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A rare Australian sea lion ( Neophoca cinerea ) on Kangaroo Island has been confirmed to have died from highly pathogenic H5N1 bird flu. The sea lion had recently been attacked by a shark, weakening it. Testing revealed the cause of death was the virus . Another dead sea lion is being tested .
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