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Pink-footed Shearwater: Large shearwater, gray-brown upperparts, white underparts, mottled brown flanks and undertail coverts. Head is gray-brown and pink bill is tipped with black. Flight feathers are dark-bordered and underwing coverts are mottled gray. Alternates slow wing beats with low glides.
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Sooty Shearwater: Large shearwater with dark gray-brown body, darkest on tail and primaries. Underwing coverts are pale. Bill is long and dark. Legs and feet are black. Eats fish, squid and crustaceans. Long, narrow wings are slightly swept-back. Alternates strong direct flapping with long glides.
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Heermann's Gull: Medium-sized gull with gray underparts and dark gray upperparts. Head is white and bill is bright red with black tip. Tail is black and edged with white. Legs and feet are black. Dives into ocean to catch fish. Also steals and scavenges. Flight is bouyant and direct.
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Laughing Gull: Medium gull, gray back, white underparts. Head has black hood, neck is white, and bill is red. Wings are gray and white-edged and black at tips; tail is white. Legs and feet are black. Slow flight with deep wing beats. Soars on updrafts. Named for its laughterlike call.
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Ring-billed Gull: Medium gull with gray upperparts and white underparts. Head is white and bill is yellow with black ring near tip. Wings are gray above, tipped black with white spots, and white below. Yellow legs and feet. Strong direct flight on deep wing beats, soars on thermals.
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California Gull: Moderately large gull, white body, gray wings, black wing tips. Bill is yellow with red and black spot near tip of bill on lower mandible. Legs are yellow; eye is dark with red orbital ring. Strong direct flight with deep wing beats. Soars on thermals and updrafts.
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Herring Gull: Large gull, pale gray back and wings with black tips, white head, neck breast. White tail and underparts. Bill is yellow with red spot near tip; legs are pink. Strong steady flight with deep wing beats. Soars on thermals and updrafts. Most widespread North American Gull.
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Lesser Black-backed Gull: Medium-sized gull with dark gray back and wings. Head, neck and underparts are white. Rump and tail are white. Bill is yellow with red spot near tip. The wings have dark tips with white spots; legs and feet are yellow. Eyes are yellow with red orbital rings.
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Elegant Tern: Medium tern, pale gray upperparts, white underparts may have pink tint. Black cap has shaggy crest; orange or red-orange bill is long, slightly decurved. Outermost primaries have faint black smudges. Tail deeply forked, legs are black. Hovers above water before diving.
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Royal Tern: Large tern, pale gray upperparts; white face, neck, and underparts. Head has spiky, black crest and cap, and heavy, bright orange bill. Wings are black-tipped above and black-edged below; tail is deeply forked. Legs and feet are black. Hovers before plunge diving for prey.
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Caspian Tern: Large, stocky tern with pale gray upperparts, white underparts. Cap is black and may appear weakly crested; large bill is coral-red. Undersides of primaries are gray. Tail is white, relatively short, and slightly forked; legs are black. Hovers above water before diving.
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