In brief
Scientists estimate that more than 13,000 baby seals died, wiping out over 75% of the 17,000‑strong population on Heard Island. The H5N1 strain, also affecting penguins, spread via migrating birds from the Crozet Islands. Australian authorities warn that the virus could reach the mainland and will keep monitoring the islands closely. The event highlights the global reach of bird flu and its impact on vulnerable species.
Breathtaking footage shows wide‑scale devastation, with many baby seals in the water.
Scientists count at least 13,359 seal pups dead, leaving more than 75 % of the island’s young population wiped out. The losses were mainly in the southern elephant seal group, with smaller impacts on king and gentoo penguins.
The H5N1 strain reached Heard and McDonald Islands around August, likely carried by migratory birds from the French‑owned Crozet Islands. Australia has had no cases on the mainland, but officials say the virus might travel further and plan to keep checking.
The research, published on BioRxiv, is still under review but shows a pattern similar to other sub‑Antarctic islands where seal populations suffer heavy losses from bird flu.
Source: BBC News – "Bird flu kills more than 75% of baby seals on remote Australian island".
