pigs and goats, as well as from introduced competitors such as Common Blackbirds and Crimson Rosellas. Extinctions include that of the endemic Norfolk Island Kaka and Norfolk Island Ground-dove along with endemic subspecies of pigeon,starling, triller, thrush and boobook owl, though the latter’s genes persist in a hybrid population descended from the last female. Other endemic birds are the White-chested White-eye, which may be extinct, the Norfolk Island Green Parrot, the Norfolk Island Gerygone, the Slender-billed White-eye and endemic subspecies of the Pacific Robin and Golden Whistler.24 - The Norfolk Island Group is also home to breeding seabirds. The Providence Petrel was hunted to local extinction by the beginning of the 19th century, but has shown signs of returning to breed on Phillip Island. Other seabirds breeding there include the White-necked Petrel, Kermadec Petrel, Wedge-tailed Shearwater, Australasian Gannet, Red-tailed Tropicbird and Grey Ternlet. The Sooty Tern (known locally as the Whale Bird) has traditionally been subject to seasonal egg harvesting by Norfolk Islanders.25 - Norfolk Island has only one native mammal, Gould's Wattled Bat ( Chalinolobus gouldii ). It is very rare and may be extinct on the island.