 The two native mammals, Gould’s wattled bat ("Chalinolobus gouldii") and the Eastern free-tail bat ("Mormopterus norfolkensis"), are both thought to be extinct.The reason that many of the native animals are endangered or extinct is largely because of feral animals, such as the black rat ("Rattus rattus") and the feral fowl ("Gallus gallus").Norfolk Island is home to the endangered Norfolk parakeet, which is on the brink of extinction under threat from feral cats and rats.