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Recording Observations of Seabirds
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ADULT BREEDING ADULT NON-BREEDING Albatross Arctic Skua Atlantic Bill black birds Black-headed Gull blackish blackish-brown Body Upperparts breeding adult browner brownish brownish-grey chin and throat coasts Common Tern Cormorant coverts crest crown darker diagnostic Differs dispersal dusky egg-dates feathers Figs FIRST-SUMMER FIRST-WINTER flanks fledging flight foreneck Grebe greyer Gull hindneck IMMATURE Indian Ocean Iris brown jizz Juveniles separable legs Legs/feet mantle Manx Shearwater mottled nape neck non-breeding adult northern numbers outer primaries Pacific Pacific Ocean pale grey paler pelagic Petrel PIate PLATE plumage present species range overlaps Resembles Returns to colonies RR MAP saddle Sandwich Tern scapulars seasonal variation SECOND-WINTER secondaries separable from adults Sexes alike Shearwater sides of breast sides of face Skua smaller South America southern Southern Giant Petrel Storm-petrel streaked subspecies subterminal Tern Text trailing edge tropicbirds Underparts Underparts mostly white Underparts white undertail-coverts underwing-coverts upper breast whitish Wings Upperwing Wingspan winter