Tasmania recorded its first suspected positive case of H5N1 bird flu on Thursday, marking the virus's presence in all six Australian states.
The federal government has committed $2 million to vaccinate vulnerable birds in captivity and over 5,000 penguins on Victoria's Phillip Island and St Kilda.
While the virus has not yet been detected in commercial poultry, the government warns that nearly 400 native bird and mammal species are at high risk of infection.