A seabird that breeds in the Kaikōura mountains of New Zealand's South Island. It feeds at sea and moves to Australia in winter.
It has a dark brown head and back, a white belly, and long narrow wings. The contrast between the dark upperparts and white underparts helps identify it in flight.
It feeds at sea and breeds in large burrow colonies on slopes above 1,200 m near Kaikōura. After breeding, it moves to Australia for winter.
An extinction-risk assessment has not been added yet.