The Westland Petrel breeds around Punakaiki on New Zealand's South Island. It has dark plumage and a yellow bill with a dark tip, and is mainly nocturnal at its breeding colony.
It is dark overall and has a stout yellow bill tipped with dark coloration.
It is mostly nocturnal at the breeding colony and nests in burrows in coastal broadleaf forest. At sea it feeds on fish.
An extinction-risk assessment has not been added yet.