It also hosts a globally significant population of Southern giant petrel. Both giant petrel species make up the genus "Macronectes". The northern giant petrel is , across the wings and of body length. The southern giant petrel measures with a wingspan of . Other birds include the southern giant petrel, with sizeable colonies on Bird Island. Wandering Albatross ("Diomedea exulans") and Southern Giant Petrel ("Macronectes giganteus").