The spread of H5 bird flu into foxes on Australia’s mainland has prompted calls for a major rethink on biosecurity, shifting the focus from rural agricultural zones to high-density urban environments, according to wildlife authorities. Following the initial detection in metropolitan Adelaide and a subsequent confirmed death in Torquay, south-west of Melbourne, experts warn that cities provide dense populations of scavenging mammals that require immediate management changes.
Urban Fox Densities Outpace Rural Areas
City landscapes offer abundant shelter and food sources that allow fox populations to thrive at rates far exceeding those in natural habitats, according to vertebrate pest controller and biodiversity surveyor Lisette Mill. While many assume rural regions hold the highest concentrations of the pests, urban areas record double or triple the density per square kilometre.
“There’s places to hide: rubbish bins, compost bins. Pet food in backyards, you name it. Cities are just forests of food for a fox,” Ms Mill said. In some Melbourne suburbs, populations reach between 16 and 23 foxes per square kilometre among an estimated national total of 1.7 million foxes.
Biosecurity Risks for Households and Pets
Although authorities note there is currently no evidence of mammals spreading the virus between one another in Australia, urban foxes pose a physical threat by moving infected carcasses near residential properties. Hungry or sick foxes frequently target backyard animals, including chooks, guinea pigs, and rabbits, according to pest control experts.
“This is the time when all of us pick up that biosecurity banner and go, ‘OK, we know that foxes are probably going to be coming around and they might come through our yard in the night,'” Ms Mill said. Property owners are advised to secure waste bins, clear yards of food sources, and prevent household pets from interacting with wildlife.
Pro Tip: Protecting Backyard Pets
Keep outdoor pet food bowls empty overnight, ensure compost bins are tightly sealed, and lock up backyard poultry securely to deter scavenging urban wildlife.
Agricultural Stakes and National Pest Funding
Agricultural leaders warn that unchecked pest populations jeopardize commercial food production if the virus enters production facilities. National Farmers Federation chief executive Mike Guerin welcomed recent federal funding for pest management and urged state governments to match the financial commitment.
“Whether it be wild birds or foxes or pigs, they can all be spreaders of the disease and if they get into, for example, a poultry farm and we get the disease into production agriculture, it’s a far different outlook for Australia,” Mr Guerin said. Feral pests already cost the environment dearly, with foxes alone responsible for killing an estimated 300 million native animals annually and driving mammal extinctions across southern Australia.
Official Guidance and Wildlife Precautions
Australian Chief Veterinary Officer Beth Cookson described the detection of H5 in foxes as a concerning development that matched contingency expectations. Dr Cookson confirmed that testing shows no sign of mammal-to-mammal transmission domestically, reiterating that the public and pet owners should strictly avoid handling sick or dead wildlife.
Did You Know?
Foxes are considered one of the most damaging invasive species in Australian history, contributing heavily to the loss of 24 mammal species in South Australia over the past 250 years.
Frequently Asked Questions
Can dogs and cats catch H5 bird flu from foxes?
Overseas outbreaks indicate that domestic cats and dogs can contract H5 bird flu, typically through direct contact with infected birds rather than mammals.
Are foxes spreading bird flu to other mammals in Australia?
According to Australian Chief Veterinary Officer Beth Cookson, there is currently no evidence of mammal-to-mammal transmission associated with H5 bird flu in the country.
How many foxes live in Australian urban areas?
Australia has an estimated 1.7 million foxes, with urban densities reaching up to 16 to 23 foxes per square kilometre in certain Melbourne suburbs.
What should I do if I find a sick or dead animal?
Federal veterinary authorities advise the public and pet owners to completely avoid contact with any sick or dead wildlife.
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