Seal Island and Penguin Island are in the bay; Ichaboe, Mercury, and Hollam's Bird islands are to the north; Halifax, Long, Possession, Albatross, Pomona, Plumpudding, and Roastbeef islands are to the south.
Gulls and amphibious birds abound in large variety; three kinds of penguin have their rookeries and breed here, migrating yearly for some months to the South American mainland.
Among the birds of the island are the eagle, hawk, petrel, owl, finch, peewit, diamond bird, fire-tail, robin, emu-wren, crow, swallow, magpie, blackcap, goatsucker, quail, ground dove, parrot, lark, mountain thrush, cuckoo, wattlebird, whistling duck, honeybird, Cape Barren goose, penguin duck, waterhen, snipe, albatross and laughing jackass.
Stray specimens of the great king penguin have been observed, and there are also mollymauks (a kind of albatross), Cape pigeons and many carrion birds.
In the southern and western islands the fauna is restricted mainly to foxes, bats, rats, mice, the sea otter, the penguin and other aquatic birds, and various cetaceans in the surrounding waters.