More of a transient species, with vast colonies south of Stewart Island, nevertheless it is often seen wheeling offshore. Can be confused with either the Black Petrel, which nests on Great & Little Barrier Islands, or the Flesh-footed Shearwater of Karewa Island, near Matakana Island.
Sooty Shearwater - NZ Birds Online
Sooty shearwater. Ventral view of adult in flight. At sea off Banks Peninsula, April 2009. Image © David Boyle by David Boyle