This long-winged Pterodroma is generally dark above and white below, with a conspicuous white forehead and face and white throat. This species a long dark tail–proportionally longer-tailed than other North Pacific procellarids–that tapers to a narrow point, upperwings, back, rump, and hood are dark dusky gray-brown, may show a faint suggestion of an "M" pattern across the coverts and mantle; underparts are mostly as are the forehead, and throat. Underwings are white with a broad dark trailing edge and diagonal dark bar at wrist. Black cap extends down to sides of neck. Formerly known as Dark-rumped Petrel, from which Hawaiian and Galapagos Petrels were split; the two are not generally distinguishable at sea, but most North American records are probably Hawaiian.
Length: 43 (cm) Wingspan: 91 (cm)
Open ocean, rarely seen from shore.
Nests in burrows, laying a single egg; attends nest site at night. Strong flier over water. Endangered; nests are predated by introduced animals such as rats and mongooses.
Picks food from ocean's surface. Eats a variety of small aquatic organisms.
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