Australia is host to 56 invasive vertebrate animal species. Of these, the ones with the most impact (in order of damage estimates) are: European Red Fox, feral cats, rabbits, feral pigs, wild dogs, the house mouse, carp, goats, cane toads, wild horses and camels.
Foxes cost the Australian economy over $200M annually – a large part of this in environmental terms. Rabbits are estimated to cost our agricultural industries around $113M and feral pigs $106M every year, and stock losses to wild dogs is so severe in some areas as to make production non-viable. Altogether, it is estimated that invasive animals cost Australasia at least $720M annually in economic, environmental and social damage.