Also known as: Dusky-backed Shearwater, Baillon's Shearwater, Tropical Shearwater, Bannerman's Shearwater, Mascarene Shearwater, Persian Shearwater
31 cm (12") Wings 69 cm (27") Open Atlantic Ocean. Fairly common. Dark above, white below. Similar to Manx Shearwater but has longer tail and dark undertail coverts and dark underwing primaries or wing tips.