Tips for using Browse:

Browsing is a valuable way to learn about birds, however it is a brute force approach and not designed for identification. A more sophisticated approach to finding a bird with specific field marks is to use the Step by Step Search. You can also try the Wizard to find a bird, which uses a question and answer approach, but again it does not give you the flexibility of the Step by Step Search.

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Roseate Tern
Roseate Tern: White below with slight, variable pinkish cast visible in good light; pale gray above with black cap, nape and deeply forked tail that projects well beyond wingtips at rest. Bill mostly black with some red at base; legs and feet are red-orange. Graceful, direct flight.
Slaty-backed Gull
Slaty-backed Gull: This large gull has a slate-gray back, white head, belly, tail, and upper wings; dark outer primaries separated from mantle by row of white spots. Gray underside of primaries; broad white trailing edge to wings. It has pink legs and feet, yellow eyes with red orbital ring and a yellow bill with red spot near tip. Diet includes fish, crustaceans and insects. Sexes are similar.
Sooty Tern
Sooty Tern: This medium-sized tern has long wings, a deeply forked tail, black crown, nape, and upperparts and a broad triangular white forehead patch. The underparts are white; upper tail is black with white outer edges. It has a direct flight with strong, shallow wing beats. It hovers before dipping for prey. It feeds on squid and fish. Sexes are similar.
Large-billed Tern
Large-billed Tern: Dark gray mantle and short dark gray tail; black cap; white breast, belly, chin, cheeks, and throat; black primaries to the bend of the wing are striking in flight; white secondaries; distinctive large yellow bill. Yellow legs, feet. Direct flight with strong shallow wing beats.
Great Black-backed Gull
Great Black-backed Gull: World's largest gull. White head, black upperparts, white underparts, large yellow bill with red spot on lower mandible, pale-eyed with red orbital ring, pink legs, feet. Flight is direct and powerful with deep, slow wing beats. Soars on thermals or updrafts.
Gull-billed Tern
Gull-billed Tern: Lightest North American tern. Black cap that extends below eyes, down nape; pale gray upperparts that are darker at the wingtips; short, stout black bill and black legs, feet; long wings with very long outer primaries. Direct flight with graceful, shallow wing beats.
Kelp Gull
Kelp Gull: Large, stocky gull with white head, underparts, tail. Black back and upperwing with white trailing edge and one distinctive white spot on outer primary tip. Bill is yellow with a red spot near tip; eyes are yellow-gray with red orbital rings; legs and feet are yellow-green.
Cory's Shearwater
Cory's Shearwater: Large gray-brown shearwater, white underparts, pale yellow bill. Feeds at night on crustaceans and large sqiud it takes from the surface. Best identified by its relatively slow, languid flight compared to other shearwaters. Wings held downward. Soars on fixed wings if wind is up.
Ross's Gull
Ross's Gull: The pink gull of the high Arctic. Small gull, pale gray upperparts, gray-white nape, white neck with thin black collar, and white, wedge-shaped tail; underparts are variably pink. Black bill is very short; legs, feet are orange-red. Often feeds on mudflats like a wader.
Sandwich Tern
Sandwich Tern: This is the only medium-sized tern with a long slender black bill tipped with yellow. The upperparts are very pale gray, nearly white, and the underparts are white. The black crown has a short black crest, the white tail is deeply forked, and the legs and feet are black. It has a direct flight and hovers before diving for fish. Sexes are similar.
Yellow-footed Gull
Yellow-footed Gull: Large, dark-backed, white gull with distinctive yellow legs. Bulbous bill is yellow, red spot near tip of lower mandible. Upper wings are dark gray with white spots near tips, white trailing edges. Strong, direct flight with deep, steady wing beats. Rides thermals and updrafts.
Red-legged Kittiwake
Red-legged Kittiwake: Small Alaskan gull white overall with gray back and wings, small yellow bill and bright red legs. Black wingtips. Eats small fish, squid, and marine zooplankton. Graceful, bouyant flight with rapid, shallow wing beats. Hovers briefly above prey before dipping down to sieze it.
Great Skua
Great Skua: Large, heavy-bodied seabird, prominent white patch in primary feathers. Body color ranges from a light bleached to dark brown, all have a cinammon wash that makes the bird look red-tinged. Strong direct flight with constant shallow wingbeats. Hugs wave contours or flies up to 150 feet.
Ivory Gull
Ivory Gull: A pure white gull whose entire life is restricted to the edge of the floating pack ice. Legs dark, bill dusky with yellow tip. It eats fish, insects, lemmings and crustaceans, and is also an active scavenger. Bouyant, graceful flight. Often flies with feet trailing and dangling below.
Barolo Shearwater
Barolo Shearwater: Tiny shearwater, dark brown upperparts and white underparts; dark cap extends only to eye. Bill is short and black. Swims and dives for food, picks food off surface of water. Feeds on fish and squid. Flight is low, fast and straight, alternates rapid wing beats and banking glides.
Brown Noddy
Brown Noddy: This medium-sized tern is brown except for the white forehead blending to a gray nape and a small white lower half-eye ring. Its wedge shaped tail has a small notch at the tip. It has black legs and feet and a long slender bill. It has a strong swift flight with steady wing beats. It often flies with erratic changes of direction. It feeds mainly on fish and squid. The sexes are similar.
Murphy's Petrel
Murphy's Petrel: This large petrel is overall gray or gray-brown with a pale throat. The under wings have pale bars, the legs and feet are pale, and the toes have black distal webbing. The bill is black, and it feeds on squid and crustaceans. It has a swift flight, alternating several rapid wing beats with long glides. It does not follow ships. The sexes are similar.
White-tailed Tropicbird
White-tailed Tropicbird: This large white bird has a long black bar on upperwing coverts and outer primaries, black loral mask which extends through and past the eye, yellow-orange bill, white tail streamers, yellow legs and feet and black webbed toes. Feeds on fish and squid. Buoyant, graceful pigeon-like flight with fluttering wing strokes alternating with soaring glides. Sexes are similar.
Aleutian Tern
Aleutian Tern: A medium tern, with white forehead, black cap, eyeline, bill, and legs. Upperparts and underparts are gray with white rump and tail. Undertail coverts, cheeks, and area below cap are white. Juvenile is buff and brown on top and flanks, with pale gray underparts. Wing projects beyond tip of tail at rest. Strong direct flight with deep wing beats, often high above water.
Mottled Petrel
Mottled Petrel: This medium-sized petrel is mostly gray with mottled white markings. It has a gray and white face and throat, and white upper breast and under tail. The wings have distinct black bars on white undersides. It feeds on small squid and fish. Alternates high soaring arcs and gliding with rapid wing beats. Sexes are similar.
Stejneger's Petrel
Stejneger's Petrel: This small petrel has gray-brown upperparts, dark gray rump, white underparts, black head, nape and bill, white face, gray-brown upperwing and black greater coverts. Outer primaries form an M shape across lower back. Blue-gray legs and feet and gray-brown, mottled white tail. Feeds on fish. Rapid erratic flight with fast wing beats followed by arcing glides. Sexes are similar.
Wedge-tailed Shearwater
Wedge-tailed Shearwater Dark Morph: This large shearwater is dark brown overall with a black-tipped, dark gray bill. Tail is long and pointed in flight, extends past the pink legs and feet, and fans to wedge-shaped when banking turns or landing. Soars with slow flapping wing beats followed by upward glide. Diet typically includes fish and squid. Sexes are similar.
Audubon's Shearwater
Audubon's Shearwater: Small, stocky seabird with dark brown upperparts and white underparts. Underwing coverts are white. Tail is dark brown with short, gray undertail coverts. Bill is dark and legs and feet are pink. Fish and squid make up most of its diet. Alternates rapid wing beats with glides.
Bermuda Petrel
Bermuda Petrel: Medium petrel, gray-brown upperparts shading to black on rump; white underparts except for dusky sides of upper breast. Base of tail has white band. White face, forehead. Black-brown cap goes to eyes. In flight shows black-gray upperwings, white underwings with black margins, tips.
Black Noddy
Black Noddy: Medium-sized tern, very dark brown-black with white cap, white (lower) half-eye ring, and long slender bill. Wedge shaped tail has small notch at tip. Sexes are similar. Juvenile appears more brown, white cap is more distinct.
Black-tailed Gull
Black-tailed Gull: Large gull with white head, neck, breast, and underparts; light charcoal-gray wings and back; large yellow bill with black ring above red tip; pale yellow eyes with red orbital ring; short yellow legs and feet; long wings; telltale short black tail with white edge.
Bridled Tern
Bridled Tern: Medium pelagic tern. Black crown, nape separated from gray-brown upperparts by whitish collar. Chevron-shaped white forehead patch extends behind eye. Long pointed wings and deeply forked tail. Whitish underparts; underwings have brown trailing edge. Black bill, legs.
Red-billed Tropicbird
Red-billed Tropicbird: This slender, white, gull-like seabird is the largest tropic bird. It has long white tail streamers, a white back that is finely barred in black, a black eye stripe curves that upward behind the eye, black primaries, and a red bill. Female resembles the male but is less tinged with red. Feeds on fish and squid. Direct, rapid flight; pigeon like, stiff, shallow wing beats.
Black-capped Petrel
Black-capped Petrel: Large petrel with white underparts, dark brown to black back and upper wings, black cap, and white collar (this field mark is missing in some birds). Tail is long, dark, and wedge-shaped; underwings show broad dark margins. Hooked bill is dark, legs are pink. High arcing flight.
Fea's Petrel
Fea's Petrel: Medium petrel, gray-brown upperparts, white belly. White breast with partial gray-brown breast band. Wings bend back at the wrist, have a dark M pattern across upperwings and lower back. Underwings are mostly dark. White face, dark mask around eyes. Gray tail, pale uppertail coverts.
Herald Petrel
Herald Petrel: Medium petrel, three color morphs: light, intermediate, dark. Dark morph is dark gray overall, silver-gray to white base on underwing flight feathers. Light morph has white breast, belly and dark gray upperparts. Intermediate forms exist between light and dark morphs. Gray legs, feet.
Newell's Shearwater
Newell's Shearwater: This small shearwater has mostly black upperparts, black lower neck side, white underparts, and a small white-gray mark below the eye. It has a medium length, slender, black-gray bill with a small hook on the tip and a medium length rounded tail. Feeds on squid and small fish. Flies with quick wing beats alternated with short glides on long wings with slightly rounded tips.
Black-naped Tern
Black-naped Tern: Small, white tern with pale gray back and wings, and black line that extends from the eye back to black patch on the nape. Long, pointed wings have black line on outermost primary. Fairly long, forked tail. Sexes similar. Juvenile is like adult but has some black scaling on back, black shoulders, and bill tends to be shorter,
Greater Crested Tern
Greater Crested Tern: Large, mostly white, crested tern with gray wings and back, black cap and nape, white front. Long wings with black tips on primaries. Long, sharp, straight yellow bill. Medium length, forked tail. Sexes similar. Non-breeding adult has black and white speckled crown. Juvenile has black and white mottling on upperparts.
Lesser Frigatebird
Lesser Frigatebird: This large seabird is mostly black, with brown band on secondary coverts, white mark where inner wings meet body, and a red throat patch that inflates during courtship displays. Long pointed wings, long forked tail, long gray hooked tip bill, and short gray legs and feet. Female has black hood and white breast. Feeds on squid and fish. Graceful soaring and swooping flight.
Great Frigatebird
Great Frigatebird: This is a large, mostly black seabird with a brown band on the base of the secondaries and a red throat patch. It has very long, pointed wings and a deeply forked tail, giving it a graceful, soaring, swooping flight. The elongated bill is slightly hooked at the end. The female has a dull red eye ring, a pale gray throat, and a white breast. It feeds mainly on fish and squid.
Hawaiian Noddy
Hawaiian Noddy: These noddies are subspecies of the Black Noddy. They are medium-sized with yellow-orange legs and feet, and dark gray-brown to sooty black in color. They fly with rapid wing beats. Noio forage in near-shore waters for goat fish, herring, flying fish and gobies. Sexes are similar. They live along the coasts of the main Hawaiian Islands and throughout the Hawaiian Islands.
Juan Fernandez Petrel
Juan Fernandez Petrel: This large petrel has dark brown-gray upperparts, a black M-shaped marking across extended wings, white underparts, and black-edged underside wings. It has a white face, a black cap extends below the eye, black bill, yellow legs, black toes, and a wedge-shaped tail. Feeds on fish and squid. Flies with rapid wing beats alternated with gliding, soaring arcs. Sexes are similar.
Australian Pelican
Australian Pelican: Large, white pelican with white-gray on neck, and black on inner shoulder of wing, flight feathers, sides of lower back, and tail. Huge, very long, white-pink bill. Yellow eyering around black eye. Very long, broad wings. Rather short, black-gray legs and webbed feet. Sexes similar, juvenile has black-brown instead of black.
Tropical Shearwater
Tropical Shearwater: Small seabird black-brown above, on sides of neck, undertail, and on flight feathers and leading edge of underwing. Underparts, upper sides of rump, and wing linings white. Medium, blue-gray bill with slightly hooked tip. Long, slightly pointed wings. Short, pink-gray legs and webbed feet. Sexes and juvenile similar.
Whiskered Tern
Whiskered Tern: Small to medium-sized gray tern, black cap, white throat. White vent. Gray-white underwing. Red bill. Long wings. Short, notched tail. Sexes similar, non-breeding adults white, gray-white wings, red-gray bill and legs, black streaks on back of crown. Juvenile like non-breeding adult but orange-brown and black mottling on back.
Brown Booby (Palau)
Brown Booby (Palau): Large seabird with medium, yellow to blue-gray bill, blue to yellow facial skin, and medium, wedge-shaped tail. Sexes are similar; black-brown above, and on breast. White on rest of underparts and wing linings. Medium, green-yellow legs and webbed feet. Juvenile like adult but has black-brown bill, and little or no white on underparts.
Providence Petrel
Providence Petrel: Medium-sized, gray-brown seabird with black spot in front of eye, gray-white on front and around base of bill, and gray-white mottling on belly. Long, pointed wings are gray-brown on top of primaries and gray-white on underside of primaries and secondaries. Medium-length rounded tail. Sexes and juvenile similar.
Common Tern (Palau)
Common Tern (Palau): Medium-sized tern with medium gray upperparts, pale gray underparts sometimes with some pink early in breeding season; glossy black cap and nape. Wings are dark-tipped and have dark leading edge on fore wing. Red bill is black-tipped. Legs are red and tail is deeply forked and elongated, tail reaches wingtips at rest. Sexes are similar. Winter adult and juveniles have white forehead, black crown with white streaks; prominent dark bar on lesser coverts; underparts gray; black bill with red base; legs duller red to black-red.
Little Tern
Little Tern: Small white tern, black cap, white front. White-gray on back and upper wings. Outer three primaries black-gray. Medium, pointed, orange-yellow bill with black tip. Short, orange-yellow legs and feet. Sexes similar. Winter adult has less black on head, black bill, and duller legs. Juvenile like winter adult but more black in wings.
Matsudaira's Storm-Petrel
Matsudaira's Storm-Petrel: Medium, black-brown storm-petrel with buff-brown patch on upper wing, and small white U-shaped patch on base of primaries. Wings are long and pointed. Medium black bill has small tube on top. Fairly long, strongly forked tail. Both sexes and juvenile similar.
Gray-backed Tern
Gray-backed Tern: This medium-sized bird is mainly dark above and white below. It has long pointed wings and a long forked tail. It has a black cap, nape and a line through the eye to the base of the bill, white front, and white outer tail feathers. It has a black, dagger-like bill and short black legs. The diet includes tiny fish and squid. The swooping flight is graceful and buoyant.
Belcher's Gull
Belcher's Gull: Formerly known as the Band-tailed Gull. Has a mostly white body with black back, distinctive black tail band, yellow legs, feet. Black wings with white trailing edges. Yellow bill; lower mandible tipped with red, upper mandible tipped with black. Strong direct flight.
Yellow-nosed Albatross
Yellow-nosed Albatross: Pelagic albatross with pale gray head, neck, rump, black back, upperwings, white underparts and black margin around white underwings. Red-tipped black bill has yellow patch on upper mandible. Gray legs, feet. Glides and soars for hours with minor adjustments to wing position.
White Tern
White Tern: This medium-sized tern is snow white overall. It has dark eyes and black eyerings which makes it appear to have large eyes. The wings and tail may appear translucent when overhead. It has a notched tail, a black bill with a dark blue base, and blue-gray legs and feet. Feeds primarily on juvenile or smaller fish. Swerves, swoops, and soars. Sexes are similar. AKA Common Fairy Tern.
Black-browed Albatross
Black-browed Albatross: White head, neck, underparts, and black back, tail. Yellow bill with red tip, pale pink-gray legs and feet. Easily identified by black tail, stiff wing beats and long narrow pointed wings. Soars effortlessly for long periods of time, may circle and glide for long distances.
Yellow-legged Gull
Yellow-legged Gull: Large white gull, medium gray upperparts and red spot on bright yellow bill; legs and feet are yellow. Tail is white. Wades or makes shallow dives to catch food, steals, scavenges. Strong, direct flight with deep, steady wing beats. Rides thermals and updrafts, sometimes hovers.
Northern Gannet
Northern Gannet: Very large seabird. White overall with black primaries and long pointed wings. Light buff-yellow wash on crown of head extending down nape may be visible. Bill, legs, and feet are gray. Dives for fish and squid. Alternates rapid wing beats with short glides. Soars to great heights.
Band-rumped Storm-Petrel
Band-rumped Storm-Petrel: This is a black-brown storm-petrel with gray-brown wing bars and a conspicuous white band across the rump and large, slightly notched tail. It has a black bill, legs and feet. It has a buoyant, zigzag flight, alternating several rapid wing beats. It feeds on invertebrates, small vertebrates and sometimes carrion from the water's surface. The sexes are similar.
Parkinson's Petrel
Parkinson's Petrel: Medium to large seabird with overall black or dark brown plumage. It has a yellow-white bill with a black tip, black legs and feet, and a medium length tail. Has powerful flight with slow flapping followed by long glides on long wings.
Blue-gray Noddy
Blue-gray Noddy: This small seabird has pointed wings, a short, slightly forked tail and a white partial eye ring. It has a short black dagger-like bill and black legs and feet. It is pale gray, darker gray on the back and rump, brown-gray on upper wings, and black-gray on primaries. It flies with rapid wing-beats near the surface of the water. It feeds on tiny fish, squid and small crustaceans.
Bonin Petrel
Bonin Petrel: This small seabird has a short, slightly hooked bill with a short tube on the top. It has gray upperparts, a gray neck side and a white front and underparts. Upper wings are black-gray, and under wings are white with black-gray leading and trailing edges. It has pink legs and feet and an agile flight with rapid wing beats. It mainly feeds on lantern fish and hatchet fish.
Christmas Shearwater
Christmas Shearwater: This is a small to medium-sized bird with entirely black brown plumage that is slightly paler below. It has pale fringing to some of the feathers on the back and gray legs and feet. It has a short, narrow and slightly hooked black bill. In flight, alternates glides with rapid wing-beats. It feeds mainly on the larval forms of fish and squid. The sexes are similar.
Black-winged Petrel
Black-winged Petrel: This petrel is medium-sized with dark gray around the eye, upperwings black with gray secondaries, underparts white with narrow gray band across upper breast, underwing white with black edging. It has a stout, short black bill and pink legs and feet with black toes. Flight has rapid wing beats with glides and soaring arcs. The diet is mainly comprised of squid and prawns.
White-chinned Petrel
White-chinned Petrel: Medium to large seabird with overall black or dark brown plumage. It has a chalky white bill, black legs and feet, and a medium length tail. It often shows a silvery patch on the base of the primaries of its long wings. Flight is powerful with slow wing beats and long glides.
Cape Verde Shearwater
Cape Verde Shearwater: Large seabird with gray-brown upperparts, dark brown flight feathers, and white underparts. Light pink bill is fairly long and thin with a dark ring near the slightly hooked tip. The wings are long and the tail is medium in length. Flies with rapid stiff wing beats alternated with short glides.
Hawaiian Petrel
Hawaiian Petrel: This medium-sized, tube-nosed seabird has a white front and cheeks, black upperparts and white underparts. It has a square, medium-length tail and long pointed wings. The diet includes mostly squid, but it also takes fish and crustaceans. It has an erratic, arching and diving flight. The males are slightly larger than the females.
Ashy Storm-Petrel
Ashy Storm-Petrel: Small seabird, gray-black overall, dark bill, forked tail. Gray wash on underwing coverts are visible at close range. Legs and feet are dark gray. Unlike most storm-petrels, it doesn't travel far from colonies after breeding. Flight is fluttering and direct on shallow wing beats.
Iceland Gull
Iceland Gull: Large, white gull, pale, pearl-gray back and upper wings. Bill is yellow, red spot at tip of lower mandible. Wing tips sometimes marked with pale to dark gray. White tail; legs and feet are pink. Direct flight with strong deep wing beats. Soars on thermals and updrafts.
Laysan Albatross
Laysan Albatross: Large seabird with dark brown back, white head, neck and rump, dark eye patch. Bill is thick and yellow with gray hooked tip. Wings dark brown above and white below, with irregular brown-black borders, dark brown-black with white coverts, and pink legs and feet. Feeds on fish and invertebrates. Dynamic soaring, stays aloft for hours with little flapping of wings. Sexes similar.
Least Tern
Least Tern: This small tern has slate-gray upperparts, white underparts; crown and nape are black, and the forehead is white. Black leading edge of outer wing is conspicuous in flight. The tail is forked, and the bill and feet are yellow. It feeds on small fish and invertebrates. It has a fast smooth flight with rapid wing beats. Hovers briefly before dipping down to seize prey. Sexes are similar.
Herring Gull
Herring Gull: This large gull has a pale gray back, black-tipped wings, a white head, neck, breast, tail and underparts. The bill is yellow with a red spot near the tip; legs are pink. Diet includes marine invertebrates, fish and insects. It has a strong steady flight with deep wing beats and soars on thermals and updrafts. The males are larger than females; the sexes have similar plumage.
Forster's Tern
Forster's Tern: Medium tern, pale gray upperparts, black cap, white underparts. Bill is orange, black tip. Wings are pale gray with paler primaries. Tail is pale gray, deeply forked with dark inner edge, white outer edge. Orange legs, feet. Hovers above water before diving for prey.
Franklin's Gull
Franklin's Gull: This medium-sized gull has a gray back and white underparts. It has a black head, white eye ring, orange bill with a black spot near the tip, and red-orange legs. The wings are short with white spotted black tips. It has a strong direct flight with deep wing beats. It feeds mostly on terrestrial and aquatic insects. The sexes are similar; males are slightly larger.
Heermann's Gull
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.
Long-tailed Jaeger
Long-tailed Jaeger: Smallest but most buoyant and graceful jaeger or skua, with gray upperparts, white breast and gray belly. Black cap covers eyes, crosses chin and ends at yellow nape. Upperwings are dark edged. Tail is gray with black edges and long black streamers. Legs are blue-gray and toes are webbed. Sexes are similar. Juvenile is heavily barred and spotted gray; has white patches on underwings, white throat, white belly and dark-tipped gray bill. Dark juvenile is darker overall; has gray throat and lacks white belly.
Short-tailed Albatross
Short-tailed Albatross: Largest and only white-bodied albatross in the North Pacific. The head and nape have a golden-yellow cast, white wings have black edges and tips, and the tail is white with black fringe. Legs and feet are pink-gray. Feeds mainly on squid, but also eats fish and crustaceans. Dynamic soaring, glides for hours. Sexes are similar. Almost became extinct in the late 19th century.
Shy Albatross
Shy Albatross: Large seabird with white body and gray back. The bill is gray with a yellow tip and base. Underwing is white with diagnostic narrow black margin. Tail is gray. Legs and feet are pink. Soaring flight on stiff, slightly drooped wings. Often interuppted with several slow deep wing beats.
South Polar Skua
South Polar Skua Dark: This small, gull-like skua occurs in two color phases. Dark phase adult has a dark brown body with a large white patch at base of primaries visible in flight. Dark bill, thick and heavy; short, broad tail. Light phase adult has pale gray-brown head and underparts. Feeds on fish, krill and squid. Strong direct flight with shallow wing beats. Sexes are similar.
Sabine's Gull
Sabine's Gull: Small gull with gray back and white nape, rump, and underparts. Hood is solid black and eye-ring is dark red. Bill is black with yellow tip; legs and feet are black. The upperwings are gray with black primaries and white secondaries. Tail is slightly forked when folded.
Parasitic Jaeger
Parasitic Jaeger: The dark morph of this medium-sized jaeger has a brown body, darker cap and pale underwing patches near tips. Pale form has white underparts with brown breast band; intermediates between dark and light morphs occur. Diamond-shaped tail has elongated, pointed central feathers. Black bill, legs and feet. Alternates several deep flaps with glides and fast wing beats. Sexes are similar.
Pomarine Jaeger
Pomarine Jaeger: The dar morph of this large jaeger is dark brown except for white patches near underwing tips and sides of under tail. Light morph has white neck, pale yellow collar, white lower breast, mottled breast band, sides. Thick bill, pale base, two long central feathers twisted vertically on tail. Diet includes fish and small birds. Strong steady flight with deep wing beats. Sexes are similar.
Royal Tern
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.
Elegant Tern
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.
Glaucous-winged Gull
Glaucous-winged Gull: This large gull has gray upperparts with white underparts, head and neck. The eyes are dark and the bill is yellow with a red spot on the lower mandible. The wings are gray with white edges and spots near the tips. The legs and feet are pink. It feeds on fish, small birds, or almost anything. It has a powerful direct flight and often soars on thermals. The sexes are similar.
Western Gull
Western Gull: This large gull has gray upperparts, white head, neck, tail and underparts, yellow eyes, a bright yellow bill with red spot near tip and pale pink legs and feet. It has gray upper wings, white-edged with white-spotted black tips. Diet includes fish, crabs, clams, eggs, carrion and garbage. It has a direct flight; strong, steady wing beats; soars on thermals. Sexes are similar.
Magnificent Frigatebird
Magnificent Frigatebird: Large black seabird, orange throat patch inflates into a huge bright red-orange balloon when in courtship display. Long bill is gray, hooked. Wings are long and narrow. Tail is forked; legs and feet are dark gray. Eats fish, crustaceans, jellyfish. High soaring flight.
California Gull
California Gull: This is a medium-sized gull with a white head and underparts, gray wings and black wing tips. The bill and legs are yellow, and it has a red eyering. It has a strong direct flight with deep wing beats. It feeds on worms, mice, other birds and their eggs, and garbage. The sexes are similar, but the males are usually larger than females, with a larger bill, head and tarsi.
Ring-billed Gull
Ring-billed Gull: This medium-sized gull has gray upperparts and white underparts. It has a white head and yellow bill with a black ring near the tip. The wings are gray above, tipped black with white spots, and white below; yellow legs and feet. It has a strong direct flight on deep wing beats and soars on thermals. The sexes are similar.
Mew Gull
Mew Gull: Medium-sized gull with gray back and upperwings, and white head, neck, breast, and belly. Bill is bright yellow. Wings have white-spotted black tips; tail is white. Feet and legs are dull yellow. Graceful, bouyant flight. Undulating, with several rapid wingbeats and a pause.
Glaucous Gull
Glaucous Gull: This large white gull has a pale gray back and yellow eyes. The bill is yellow with a red spot on the lower mandible. The wings are white-edged and white tipped; the legs and feet are pink. It is an active predator of seabird nesting colonies. Diet includes fish, insects and birds. It has slow steady wing beats and soars on thermals and updrafts. The sexes are similar.
Arctic Tern
Arctic Tern: This is a medium-sized, slim tern with gray upperparts, black cap, a white rump and throat, and pale gray underparts. The tail is deeply forked and white with dark edged outer feathers. The bill is dark red. The legs and feet are red. It has a buoyant, graceful flight with steady wing beats. It feeds on small fish, crustaceans and insects. Both sexes are similar in appearance.
Bonaparte's Gull
Bonaparte's Gull: This is a medium-sized gull with a black head and bill, gray back and wings and white underparts and tail. White outer primaries with black trailing edges are visible in flight. The legs are red-orange. It catches fish by wading and diving. It has a light and direct flight with rapid wing beats. It feeds mainly on insects, which it catches in mid-flight. The sexes are similar.
Caspian Tern
Caspian Tern: This large stocky tern has pale gray upperparts and white underparts. The cap is black and may appear weakly crested. The large bill is coral-red, the undersides of the primaries are gray, a short white tail is slightly forked, and the legs are black. The flight is strong, swift and graceful. It hovers above water before diving and mainly feeds on fish. The sexes are similar.
Common Tern
Common Tern: This medium-sized tern has medium gray upperparts, pale gray underparts and a glossy black cap and nape. The wings are dark-tipped with a dark leading edge on the forewing. The red bill is black-tipped, legs are red, and the tail is deeply forked and elongated. It has a direct flight, hovering above water before diving for prey. Feeds mainly on small marine fish. Sexes are similar.
Black-legged Kittiwake
Black-legged Kittiwake: This is a medium-sized white gull with pale gray back and upperwings and black wing tips. The bill is yellow and the legs and feet are black. It has a swift, graceful flight, alternating several rapid shallow wing beats with a glide. Hovers over water before diving for prey at the surface. It feeds on marine invertebrates, plankton and fish. The sexes look very similar.
Black Skimmer
Black Skimmer: Odd-looking, tern-like bird with black upperparts and white underparts. Bright red bill with black tip, lower mandible longer than upper. Long, slim wings are dark above and silver-gray below. Tail is white with black central feathers. Legs, feet are red. Direct flight.
Black Tern
Black Tern: This small tern has a black head, bill and underparts. The back, wings and tail are silver-gray, and the vent is white. The legs and feet are dark red but may appear black. It has a buoyant, direct flight with deep rapid wing beats. It hovers for insects in an uneven foraging flight. It plunge dives on occasion. The sexes appear similar.
Black-footed Albatross
Black-footed Albatross: This large seabird has long wings, a gray-brown body, a white ring around the face at the base of the bill and pale gray upper tail coverts. Most have dark under tail coverts, some have a white under tail and belly. Highly-variable seasonal plumage. Most frequently sighted off the Pacific Coast of North America. Dynamic soaring. Glides for hours. Feeds mainly on squid and fish. Sexes are similar.
Wilson's Storm-Petrel
Wilson's Storm Petrel: This small storm-petrel has a brown-black body, pale brown wing bands and a large, white rump. It has a fine black bill with very pronounced tubes. It feeds mainly on pelagic crustaceans and fish. The wings are short and rounded. The feet extend past the tail in flight. It has a direct flight with steady, shallow wing beats. The sexes are similar in size and coloration.
Black Storm-Petrel
Black Storm-Petrel: Small seabird, brown-black overall with long, dark wings showing pale bar on upper side, and forked tail. The hooked bill is dark and has a tube on top. Legs and feet are black. Flight is mothlike with deep, steady wing beats. Comes closer to shore than most other storm-petrels.
Cook's Petrel
Cook's Petrel: This small petrel has a slate-gray back and upperwings marked by a black M-pattern, white underparts, under wings, and face with a small dark eye patch, black bill, blue-gray legs and feet, long slender wings, and a gray tail with black-tipped central feathers and white edges. It feeds mostly on fish and squid. Rapid and erratic flight. Sexes are similar.
Wedge-rumped Storm-Petrel
Wedge-rumped Storm-Petrel: Small storm-petrel, black-brown overall with large white patch on rump and central tail. Bill, legs, and feet are black. Feeds far out to sea. Flight is swift and direct, with deep wing beats and much banking and twisting. Often flies high above the surface of the water.
Sooty Shearwater
Sooty Shearwater: This large bird has a dark gray-brown body, darkest on the tail and primaries. The under wing coverts are pale. The bill is long and dark, and the legs and feet are black. It eats fish, squid and crustaceans. Its long narrow wings are slightly swept-back. It alternates strong direct flapping with long glides. The sexes are similar.
Fork-tailed Storm-Petrel
Fork-tailed Storm-Petrel: Medium storm-petrel, blue-gray upperparts, pale gray underparts. Forehead is dark gray, eye patch is gray. Primaries are darker gray than other flight feathers. Forked tail, feathers are narrowly white-tipped. Alternates rapid, shallow wing beats and stiff-winged glides.
Least Storm-Petrel
Least Storm-Petrel: Small, very rare storm-petrel with dark black-brown body and short, wedge-shape tail. The wings have black wing tips and pale brown diagonal bars visible in flight. It is the smallest Pacific storm-petrel. Flight is swift and direct on deep wing beats. Often flies low over water.
Dark-rumped Petrel
Dark-rumped Petrel: Medium petrel with dark slate-gray upperparts and white underparts. Sides of neck and underwing margins are dark. Bill is relatively short, black, and hooked. Legs and feet are pink-brown. Tail is white and wedge-shaped. Feeds on suqid, crustaceans, and fish. AKA Galapagos Petrel.
Bulwer's Petrel
Bulwer's Petrel: This medium-sized petrel is dark brown overall with pale diagonal bars across secondary coverts. The long tail is usually held in a point; wedge shape visible when fanned. It has a black hooked bill and black legs and feet. Feeds on squid and small fish. It picks food from the surface while in flight. Makes a series of stiff flaps before each short twisting glide. Sexes are alike.
Manx Shearwater
Manx Shearwater: Small shearwater with brown-black upperparts and white underparts, underwings and undertail coverts. Black head is darker than back. The bill is dark. Wings are long, slim, and straight. Tail is short and pointed. Feeds on fish and squid. Alternates long glides and rapid wing beats.
Great-winged Petrel
Great-winged Petrel: Large petrel with brown-black body except for pale gray forehead, face, chin, and throat. Bill is black and stout. The legs and feet are black. Feed on fish, squid and crustaceans. In New Zealand it is also known by its Maori name oi and as a muttonbird. AKA Grey-faced Petrel.
Buller's Shearwater
Buller's Shearwater: This medium-sized bird has gray upperparts and white underparts. The head has a white face and black cap. The bill and tail are black. The legs and feet are pink. A dark gray M-pattern is visible across the upperwings and back in flight. It rotates deep steady wing beats with long glides. It soars in high winds. It feeds on krill, small fish, and jellyfish. The sexes are similar.
Short-tailed Shearwater
Short-tailed Shearwater: This medium-sized shearwater has a dark brown body and traces of white in the center of the upperwings. It has a short dark bill and dark gray feet that trail slightly behind the rounded tail in flight. Feeds primarily on crustaceans. Alternates strong flaps with long glides; often soars for long periods. Sexes are similar.
Streaked Shearwater
Streaked Shearwater: This large shearwater has scaled, dark gray-brown upperparts, white underparts, pale bill and white forehead. White head has variable light to heavy pale brown streaks. Upper tail coverts can be white, forming a pale horseshoe. Legs and feet are pink. Feeds on small fish and squid. Flies with loose angled wings. Light, graceful flapping and gliding. Sexes are similar.
Flesh-footed Shearwater
Flesh-footed Shearwater: This is a large, bulky shearwater with a dark brown body and a darker head and tail. The bill is large and pink with a dark tip. The wings are dark with brown-edged coverts that become paler with wear. The legs and feet are pale pink. It feeds on small fish and squid. It has a slow flight, alternating stiff-winged flapping and gliding near water. The sexes are similar.
Pink-footed Shearwater
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.
Lesser Black-backed Gull
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.
Little Gull
Little Gull: The smallest of all gulls, with pale gray upperparts and white nape, neck, breast, belly, and tail. Hood is black and extends onto upper neck. Underwings are dark. Bill is dark red with black tip. Legs and feet are red-orange. Strong direct flight with deep wing beats.
Thayer's Gull
Thayer's Gull: Large gull, gray upperparts, white head, tail, underparts. Bill is yellow with red spot near the end of the lower mandible. Wings are gray with white-spotted, dark gray tips. Legs are dark pink. Direct flight, strong, steady wing beats, soars on thermals or updrafts.
Laughing Gull
Laughing Gull: This medium-sized gull has a gray back, white underparts and neck, a black hood and red bill. The wings are gray and white-edged, and black at the tips; tail is white. The legs and feet are black. Diet includes insects, fish, shellfish and crabs. It has a slow flight with deep wing beats and soars on updrafts. It is named for its laughter-like call. Sexes are similar.
White-winged Tern
White-winged Tern: Small tern, black head, body, and underwing coverts; white rump, vent, upperwing coverts, and tail; flight feathers are pale gray. Bill is dark red to black; Red legs and feet. Fluttering, uneven flight with slow, shallow wing beats. Hovers before dipping for prey.
Red-tailed Tropicbird
Red-tailed Tropicbird: This medium-sized tropic bird has silky white plumage and a small but conspicuous black eye stripe. It has a coral red bill and black legs and feet. The tail has long, red central streamers. It mainly feeds on flying fish. Swift, purposeful flight, alternates fluttering wing beats with glides. Hovers while hunting and in courtship. Sexes are similar.
Black-headed Gull
Black-headed Gull: Small, white gull with partial hood, white crescents above and below eye, and white-gray back. Red bill. Wings with black tips and black bases of primaries. Sexes similar. Non-breeding adult lacks hood, black mark behind eye, and black tip on bill. Juvenile like winter adult but more black on wing and tail with black tip.
Blue-footed Booby
Blue-footed Booby: Large, gull-like seabird with white body, brown wings and brown-streaked head and back. The blue-gray bill is long and stout. Legs and feet are powder blue. Plunge dives for fish from 50 feet above shallow water. Alternates rapid, deep wing beats with sailing glides.
Northern Fulmar
Northern Fulmar Light Morph: This large gull-like bird has gray upperparts and white underparts, head, neck, and tail. Dark morph has uniformly dark gray body and paler primaries. It has a short, thick yellow bill with a tube on top. Feeds mainly on fish, squid and zoo plankton. Flight alternates stiff wing beats with periods of gliding and banking. Sexes are similar.
Great Shearwater
Great Shearwater: Large shearwater, scaled, gray-brown upperparts, white underparts, brown markings on belly. Dark cap contrasts with white face. Tail is dark above with conspicuous white rump band and gray below. Dark, hooked bill. Pink legs, feet. Flies on deep wing beats followed by long glide.
Leach's Storm-Petrel
Leach's Storm-Petrel: This medium-sized petrel has a dark brown body and a white rump and under tail feathers. The wings are dark with a pale gray-brown bar on the upper wings. It has a long, dark forked tail, and a black bill, legs and feet. Its flight is bounding and erratic with frequent changes of direction and speed. It mainly feeds on fish, squid and shrimp. Sexes are similar.
Black-vented Shearwater
Black-vented Shearwater: Medium shearwater, brown-black upperparts, white underparts, brown mottling on sides of breast and flanks. Tail is dark. Eats fish, crustaceans, and squid. Quick low flight with short stiff wingbeats followed by glide. Soars in high winds.
Red-footed Booby
Red-footed Booby: This black-tailed white-morph is a small booby with a white head, body and tail. It has a pale blue, pink-based face and pale blue bill. It has black flight feathers and bright red legs and feet. The brown form is brown overall with darker flight feathers. Strong steady wing beats with glides. It feeds on fish and small octopi. Sexes are similar, but the female is much larger.
Masked Booby
Masked Booby: This large seabird has a white body, black trailing edge on the wings, and a pointed black tail. The head has black mask and a long pointed yellow bill. The legs and feet are yellow-gray. It plunge dives from 40 feet for small squid and flying fish. It alternates strong rapid wing beats with glides. Sexes are similar, but the female is larger.
Brown Booby
Brown Booby: This large seabird is mostly dark brown with white under wing coverts, belly and vent. It has a blue-gray to yellow bill and yellow legs and feet. To acquire food, it plunge dives from 30 to 50 feet. It feeds on parrot fish, flatfish, mullets and other fish. It has alternating strong rapid wing beats and glides. The sexes are similar.