Transequatorial migration and habitat use by Sooty Shearwaters Puffinus griseus from the South Atlantic during the nonbreeding season. The under wing coverts are pale. Shearwaters can also "swim" with their wings to pursue prey underwater to a depth of 200 feet (61 m). DIET: The sooty shearwater feeds on fish and squid, and can dive as deep as 200 feet. The Sooty Shearwater is an entirely dark brown-grey bird, apart from a broad pale stripe down the centre of each underwing. Its bill is dark and when seen close up, there is a pale band along the underneath of the wings. Range and Habitat. It eats fish, squid and crustaceans. The name "shearwater" refers to the bird's habit of gliding with stiff, still wings between waves just above the water's surface. The bill is long and dark, and the legs and feet are black. SOOTY SHEARWATERS OFF CALIFORNIA: DISTRIBUTION, ABUNDANCE AND HABITAT USE’ KENNETH T. BRIGGS Institute of Marine Sciences, University of California, Santa Cruz, CA 95064 ELLEN W. CHU A.I.B.S.-Bioscience, 730 1 lth Street, NW, Washington, DC 20001 Abstract. Pelagic, only comes ashore to breed. NESTING: Sooty shearwaters nest in colonies on small islands, in burrows. ... Habitat: The Sooty Shearwater mostly lives over deep ocean waters, but is sometimes found in onshore areas particularly in rough weather. Best viewing opportunities are from sea watching places, as birds do not come ashore, but stay out at sea. This pelagic seabird is fairly common and it is seen in the Atlantic and Pacific Oceans. While migrating, sooty shearwaters can travel up to 620 miles (1,000 km) in a single day. Sooty Shearwater: Very common birds off the California coast in the late summer, but they are only visitors to North America. Sooty Shearwater: This large bird has a dark gray-brown body, darkest on the tail and primaries. Range and Habitat. It has a long slender bill, a slender head and a longish neck. Extremely long distance migrants, as their breeding grounds are on islands in the far southern Atlantic and Pacific Oceans. It alternates strong direct flapping with long glides. Sooty Shearwater: Passage visitor to the UK & Ireland. Its long narrow wings are slightly swept-back. The Short-tailed Shearwater, which inhabits the Pacific Ocean, is very similar to this shearwater and close examination is needed to tell them apart. Lateral view of a Sooty Shearwater in low flight; note the slender bill and the dark head and trailing edge of the wing (photo courtesy of P. Brown) [April 2019] Lateral/ventral view of a Sooty Shearwater in flight; note the bowed wing tips, which are typical for the species (photo courtesy of P. Brown) Electronic tracking tags have revolutionized our understanding of broad-scale movements and habitat use of highly mobile marine animals, but a large gap in our knowledge still remains for a wide range of small species. The sooty shearwater is a seabird which is smaller than a herring gull. Breeding and Nesting They will also follow fishing vessels for offal, and whales. It is a large shearwater, with dark brown body and long brown wings. The sexes are similar. Hyrenbach, K. D. , and Veit, R. R. 2003. HABITAT: The sooty shearwater’s main habitat is the open ocean, but they can be seen along the coasts of continents. Marine Ecology Progress Series 449: 277–290. Its plumage is an all-dark brown. The Sooty Shearwater is one of the darker shearwaters seen on the oceans. the flesh-footed shearwater returns from the seas off Japan and Siberia to the same nesting burrows on Lord Howe Island - this species is listed as vulnerable in NSW the sooty shearwater returns from the North Pacific Ocean and Southern Ocean to breed in small numbers on islands south of Port Stephens Birds are visible during autumn months as birds move from summer home on north Atlantic to winter home in south Atlantic waters.
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