The Guardian reports that all Australians states and territories agreed to list cats as pests, so, legally, the felines can be shot, baited, and poisoned. Australia has an estimated 20 million feral cats, and, since its settlement, it has lost more mammalian species to extinction than any other continent. Cats threaten several bird and plant species, as well. "We are drawing a line in the sand today, which says 'on our watch, in our time, no more species extinction,'" Environment Minister Greg Hunt said. "It's tough, it's a challenge, and we can do better."