...Evans believes there are 10 million to 12 million feral cats in Australia -- each of them, on average, killing three native animals a day. If those estimates are accurate, that means a mind-boggling massacre of about 12 billion native animals a year.
And Dr. Tim Flannery of the Australian Museum says the native animals aren't equipped to fight with cats. "We've done some tests with our native animals to show that they don't recognize cat scent, for instance, as representing a threat," he said.