Millions more dollars have been thrown at a biosecurity defence plan to prepare Australia for the H5 bird flu outbreak sweeping the globe, which experts say will "almost certainly" reach our shores.

The federal government will divvy up $12 million between the states and territories for critical equipment that could facilitate a rapid mobilisation in the event of an outbreak.

The funding will also be spent on humane depopulation, decontamination and disposal equipment to prevent the spread of the disease.

Agriculture Minister Julie Collins said the movement of infected birds poses an ongoing threat, with a potential outbreak poised to cause major consequences to our wildlife and industries. 

"During spring, we have a lot of migratory birds, and we do know that Australia is at risk o

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