H5N1 Bird Flu in Australia: What Backyard Chicken Keepers Need to Know

It finally happened.

On 20 June 2026, Australia lost its status as the last continent on Earth free of the H5N1 bird flu virus. A brown skua — a large migratory seabird from the Southern Ocean — was found sick on a remote beach near Esperance in Western Australia and confirmed positive for the virus. A second bird, a giant petrel from the same area, also tested positive. Both have since died.

For most Australians, this is alarming news they'll scroll past. For backyard chicken keepers, it's the news we've been told to prepare for — and now it's here.

Right now, there are no detections in any Australian poultry — commercial or backyard — with H5N1 confirmed only in wild seabirds in a remote coastal location. This was not unexpected. The Australian Government's Department of Agriculture has been preparing for this for years. That preparation accelerated sharply after Australia's own H7 avian influenza outbreaks tore through farms from Meredith, Victoria to Hawkesbury, NSW and the ACT in 2024.

There is a plan. It's been in place. It's being activated right now.

We've put together the complete picture — how H5N1 got here, what it means for your flock, and everything you need to know to keep your girls safe. We'll be updating it as the situation develops, particularly the timeline section which tracks every confirmed detection as it happens. Bookmark it, come back to it, and share it with your flock-keeping mates.

Here's where things stand.
 

Australia Timeline — Latest Updates

Last updated: 23 June 2026

                                                                    

Thursday 25 June 2026 - TODAY

H5N1 has now been confirmed in three wild birds in Australia — two near Esperance in Western Australia, and now a third: a southern giant petrel found at Knights Beach on the Fleurieu Peninsula in South Australia, around 80km south of Adelaide. The SA bird was collected on 14 June by wildlife rescuers and confirmed positive on 24 June.

This brings H5N1 significantly closer to Australia's more densely populated regions. 

Tuesday 23 June 2026 
Two dead seabirds wash up on Fowlers Bay Beach, SA — 360km from the WA border. Samples collected, results pending. If confirmed, it would indicate rapid coastal spread and bring H5N1 significantly closer to Australia's more densely populated poultry regions on the eastern seaboard — making the biosecurity steps below more important than ever.

22 June 2026
Giant petrel confirmed positive for H5N1. Both WA birds now confirmed and deceased. Ingham's Group declares complete lockdown of all WA operations.

20 June 2026
Australian Government officially confirms H5N1 in the brown skua — the first confirmed detection on the Australian mainland.

14–18 June 2026
Brown skua found sick at Cape Le Grand National Park, Esperance. Giant petrel found sick at nearby Wylie Bay. Both Southern Ocean seabirds not commonly seen on mainland Australian beaches.

Late 2025
H5N1 confirmed on Heard Island, 4,000km from the Australian mainland.
 

What Is H5N1 — And How Is It Different To Bird Flu We've Seen Before?

Australia has dealt with bird flu before. In 2024, bird flu tore through 16 farms across Victoria, NSW and the ACT — killing almost two million chickens. It was devastating. Through mass culling of affected flocks, rigorous testing and strict movement controls, it was eradicated. The last Victorian property was cleared in late 2024, with the Australian Government officially declaring all H7 outbreaks eradicated on 3 February 2025.

H5N1 is different. Fundamentally different.

Every previous Australian outbreak involved H7 strains — strains that, while deadly to poultry, could be eliminated through culling of affected flocks. Hard, heartbreaking work, but it worked. Meredith egg farmer Brad McAuliffe, who lost approximately 500,000 birds across his two properties in 2024, described it plainly: "It stopped our business completely. We went from a big revenue business employing 40 to 50 staff to nothing. It's been absolutely devastating."

H5N1 cannot be eradicated the same way. Once it establishes itself in wildlife, there is no culling your way out of it. Since 2021, it has swept across Europe, the Americas, Asia and Antarctica — Australia was the last continent standing. Until now.

Agriculture Victoria's director of animal health Les Howard said it clearly back in October 2024, before H5N1 had even arrived: "H5N1 is different to the H7 strains in that it not only affects poultry, but it also affects wild birds and mammals. The impacts of an H5N1 outbreak will be significantly higher."

Agriculture Minister Julie Collins echoed that when confirmation came: "We've always known we could not stop it, because it would arrive by migratory birds."

The key distinction for backyard keepers: H7 was a poultry problem. H5N1 is a wildlife problem that poultry — including your backyard flock — sit inside.
 

How Did H5N1 Get To Australia?

The Southern Ocean was always Australia's vulnerability. Since 2023, H5N1 has been spreading through seabird populations across the Southern Ocean, reaching Antarctica and then Australia's own sub-Antarctic (the remote ocean region south of Australia) Heard Island in late 2025 — just 4,000km from the mainland — where it killed more than 13,000 southern elephant seal pups. Scientists had been watching the virus move closer for two years.

The carrier species matter here. Brown skuas and giant petrels are scavengers — nicknamed the "vultures of the Southern Ocean" — feeding on infected carcasses across the sub-Antarctic. They can carry the virus without immediately succumbing to it and travel thousands of kilometres. They are exactly the species you would expect to bring H5N1 to Australian shores, and exactly the species that did.

Murdoch University immunology professor Cassandra Berry put it simply: "It was inevitable that the virus was eventually going to enter Australia from the south, especially as it was found on sub-Antarctic Heard Island."
 

The Duck Problem — Silent Carriers In Your Own Flock

If you keep ducks alongside your chickens, this section is important.

Ducks are naturally tolerant carriers of avian influenza. What makes them particularly dangerous in the context of H5N1 is that they can carry and shed the virus without showing any signs of illness — no respiratory distress, no behavioural changes. Nothing to alert you that anything is wrong. Your ducks can appear perfectly healthy while your chickens show sudden lethargy, swollen combs and wattles, neurological symptoms such as loss of balance, tremors or twisted necks or die without warning.

This isn't tin hat conspiracy material — it's well established in scientific research. A 2004 surveillance study in Thailand found that most domestic ducks infected with H5N1 were completely asymptomatic, and that the initial spread of H5N1 to chickens corresponded directly to the movement of those ducks. Published research has used the term "Trojan Horses" to describe their role — and it's apt.

For backyard keepers with mixed flocks, the practical implication is straightforward: if H5N1 reaches your area, don't assume your flock is safe because your ducks look fine. Watch your chickens. They will show symptoms first.
 

How H5N1 Spreads — And What You Can Do Right Now

H5N1 spreads through direct contact with infected birds, their droppings, contaminated water, feed, equipment and clothing. Wild birds visiting your property are the primary risk to backyard flocks — they don't need to land inside your coop to contaminate feed, water or the ground your chickens walk on.

The good news is that the steps that reduce that risk are the same good biosecurity practices you should already have in place. Now is the time to make sure you do.

Limit wild bird access
Use netting, housing and fencing to keep wild birds away from your flock. This is your single most effective line of defence.

Protect feed and water
Keep feeders and waterers covered or undercover and inaccessible to wild birds. Clean up spilled feed promptly — it attracts wild birds and rodents.

Boot and clothing hygiene
Clean boots and change clothing before entering your chicken area, especially if you've been near waterways or other bird areas. This was the identified transmission vector in the 2024 Meredith outbreak.

Restrict visitor access
Prevent visitors from contacting your flock and avoid visits to places where other birds are kept without strict biosecurity in place.

Keep coops and equipment clean
Regular disinfection of poultry areas and equipment, particularly anything shared between birds.

Quarantine new birds
Always quarantine new birds before integrating them with your existing flock.

Watch for symptoms
Sudden death, lethargy, decreased appetite, swelling of the comb or wattles, respiratory distress, decreased egg production and neurological signs are all reportable. If multiple birds are affected, act immediately.

Report anything unusual
Do not touch sick or dead wild birds. Call the Emergency Animal Disease Hotline on 1800 675 888 or visit birdflu.gov.au.
 

Are My Eggs And Chicken Safe To Eat?

A resounding yes.

The Australian Government and food safety authorities are clear on this: properly cooked chicken meat and eggs are safe to eat. H5N1 is not a food safety risk when poultry products are handled and cooked correctly.

Normal food hygiene applies — wash your hands after handling raw meat or eggs, cook chicken thoroughly, and practice standard kitchen hygiene. Nothing has changed on that front.

What about raw feeding pets?
If you raw feed your dogs or cats, use commercially sourced chicken only and avoid feeding any backyard or wild birds. While the risk remains low with no current poultry detections in Australia, raw poultry carries a higher theoretical risk than cooked — standard raw feeding hygiene practices apply.

What about pets scavenging dead birds?
Keep dogs and cats away from any dead or sick wild birds. Do not allow pets to scavenge carcasses. If your pet has had contact with a dead wild bird, contact your vet for advice.

It is also worth noting that there are currently no detections of H5N1 in any Australian poultry — commercial or backyard. Australian chicken and eggs are produced under strict biosecurity and food safety standards, and those standards remain in place.

The most important thing you can do right now is stay informed and report anything unusual. Details below.
 

Resources & Reporting

If you see sick or dead wild birds, do not touch them. Report immediately.

Emergency Animal Disease Hotline
1800 675 888 — free, 24 hours, 7 days

Australian Government Bird Flu Hub
birdflu.gov.au

Australian Centre for Disease Control
cdc.gov.au