Bird Flu Is Tearing Through Australia’s Wildlife

First it was seabirds. Then seals. Now pelicans. Australia has confirmed its first case of H5 bird flu in an Australian pelican, found at Edithburgh on South Australia’s Yorke Peninsula. At almost the same time, authorities confirmed H5 in an Australian sea lion at Seal Bay on Kangaroo Island, while another dead sea lion near Victor Harbor was sent for testing. And the numbers have kept climbing.

By the 19th of September, South Australia had recorded 313 confirmed H5 bird flu events, with new detections involving greater crested terns, a fluttering shearwater, a little penguin, a Pacific gull and an Australian raven. An “event” can involve more than one animal, so even that figure does not represent an individual death toll.

Across Australia, there were already 576 confirmed H5 events in wildlife by the 17th of September. This is not just about chickens anymore. It never was.

Wildlife Could Take a Huge Hit

Attention is now turning to places such as the Macquarie Marshes in New South Wales, internationally recognised wetlands supporting tens of thousands of waterbirds, including threatened species. H5 had not reached the marshes when ABC reported from the area on the 14th of September, but conservationists were already preparing for what could happen if it does.

Waterbirds gather together in enormous numbers. That makes wetlands particularly dangerous environments once a highly contagious virus arrives.

University of New South Wales conservation biologist Richard Kingsford warned that bird flu can sometimes kill half of a population. As wetlands dry and birds become concentrated into smaller areas, opportunities for transmission increase further. Imagine losing half a population. Animals who were simply trying to migrate, breed, feed and survive.

We Have Been Watching This Happen

None of this should feel like a bolt from the blue. Herbivore Club has been following bird flu precisely because the boundaries keep disappearing.

In 2025, we reported how a Nevada farm worker contracted bird flu after exposure to infected dairy cows in Bird Flu Confirmed In Nevada.

We reported the death of a three-year-old girl from bird flu in Mexico in From Farm to Family: Bird Flu Kills a Child, and the dozens of confirmed human infections already being recorded in the United States in Bird Flu Is Spreading - And the USA Is Failing to Track It.

Then there were companion animals.

In Feeding Cats Raw Meat? You Might Be Feeding Them Bird Flu, we covered cats infected after being fed raw chicken flesh contaminated with H5N1. Some were subsequently euthanised.

Again and again, the same boundary collapses. Birds. Cows. Cats. Humans. Seals. Sea lions. And now another expanding list of wild species in Australia.

And Yes, Animal Farming Is Part of This Story

There have currently been no H5 detections in Australian poultry or other farmed animals, according to Australian authorities. The present Australian outbreak is overwhelmingly a wildlife crisis. But pretending animal farming has nothing to do with the wider bird flu problem would require ignoring everything we have already watched happen elsewhere.

In Another Pandemic in the Making, we covered H5N9 appearing on a Californian duck farm, where nearly 119,000 birds were killed following the outbreak. Dense populations of animals bred for human use do not become irrelevant simply because this particular outbreak is currently tearing through wild populations. They are part of the same world. Viruses do not recognise the conceptual boxes humans create around “wildlife”, “food animals”, “companion animals” and ourselves.

Wild Animals Keep Paying

Earlier this year, we wrote in Antarctic Species Face Extinction about animals already struggling against collapsing sea ice, warming oceans and disappearing food sources, with bird flu adding yet another threat. Now Australia is watching the virus spread through terns, gulls, penguins, pelicans and marine mammals. Different continent. Same warning. We cannot prevent every mutation. We cannot stop every wild bird migrating. We cannot put the planet inside a biosecurity shed. But we can question why humans continue breeding vast numbers of susceptible animals into systems designed around extraction, killing and consumption.

Animals, ecosystems and diseases are deeply connected, while humans continue behaving as though our exploitation of one can somehow be separated from the suffering of all the others. Viruses evolve naturally. They always have, and they always will. But animal farming supercharges that process. Industrial farms are packed with genetically uniform animals, confined in filthy, crowded sheds where disease spreads like wildfire, the perfect conditions for deadly viruses to mutate, spread, and potentially make the jump to humans. Bird flu is not just a problem for birds. Every single person who buys flesh, fur, down, or an egg-laden pastry is casting a vote for this to continue.