Formerly referred to as British Storm-Petrel, this small storm-petrel is almost entirely dark, usually looking black at a distance. Small dark bill. Dark eye. In flight, shows a white bar on underwing. Clean white rump wraps all the way around the base of tail. Dark legs and feet do not extend past square tail in flight. Has somewhat shorter, more rounded wings than similar Leach's and Wilson's storm-petrels. Flight is more stiff-winged than the buoyant darting style of the longer-winged Leach's. Very similar Wilson's Storm-Petrel lacks white bar on underwing, has gray on the upper wing coverts, and its feet project beyond the tip of the tail in flight. Also intersperses more gliding and fluttery wingbeats as it flies.
Length: 15 (cm) Wingspan: 37 (cm)
Open ocean. Sea cliffs and sea stacks for nesting.
Fluttery, weak flight pattern. Often forms flocks. Forages by picking food off water's surface or diving to small depths in search of food.
Diet consists of small fish, cephalopods and crustaceans.
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