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Just off the top of my head, twenty-four European rabbits were introduced to Australia in 1859 by estate owner Thomas Austin in Victoria. They soon spread throughout the country due to the lack of natural predators, widespread farming producing an ideal habitat, and mild Australian winters allowing them to breed year-round. Australia's equivalent to the rabbit, the bilby, was quickly pushed out by the rabbits. The bilbies are endangered, but are now making a comeback due to government protection. Between 1901 and 1907, Australia built an immense "rabbit-proof fence" to halt the westward expansion of the introduced rabbit population. The European rabbit can not only jump very high, but also burrow underground, making fencing essentially futile. During the 1950s, experiments with introduction of a virus, Myxomatosis cuniiculi, provided some relief in Australia, but not in New Zealand, where the insect vectors necessary for spread of the disease were not present. Myxomatosis can also infect pet rabbits of the same species. Today's remaining wild rabbits in Australia are largely immune to myxomatosis. The rabbit haemorrhagic disease virus has been cleared as a biological control agent against the European rabbit in Australia, and has already killed millions of the animals. It was also illegally introduced in New Zealand. This is called spoon-feeding but you do seem desparate.