 Two species of native rats, the Maclear's and bulldog rats, have become extinct since the island was settled, while the Javan rusa deer has been introduced.The endemic Christmas Island shrew has not been seen since the mid-1980s and may be already extinct, while the Christmas Island pipistrelle (a small bat) is presumed to be extinct.The fruit bat (flying fox) species "Pteropus natalis" is only found on Christmas Island, its epithet "natalis" is a reference to that name.