The Masatierra Petrel is a seabird of the open Pacific off South America. It has a grey crown and back, a black eye patch, and a thick bill.
It has a grey crown and back, a black eye patch, narrow black margins under the wings, and grey central tail feathers.
It is usually pelagic and sweeps through high arcs well offshore. It also uses rocky shores.
An extinction-risk assessment has not been added yet.