My Family is partial to the Leporidae family...
About 100 years ago, somebody brought some rabbits with him when he journeyed to Australia. Then they got loose. Rabbits had never been to the island land and had no natural predators there. Result: rabbits are now considered a major nuisance in Australia and some Aussies have gone so far as to import coyotes to hunt the rabbits.
But then there are no natural predators in Australia for coyotes...