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Birdsthreatened and/or endangeredGulls and Terns

1-40 of 42 Birds page: 1  | 2
Brown Noddy
Anous stolidus

Adult has mostly sooty brown plumage, but with white cap and nape; juvenile is similar, but with dar… read more

Black Tern
Chlidonias niger

ADULT SUMMER Has mainly gray upperparts, but head and neck, along with breast and belly, are black; … read more

Herring Gull
Larus argentatus

ADULT SUMMER Has pale blue-gray back and upper wings, except for white trailing edge and dark wingti… read more

Laughing Gull
Larus atricilla

ADULT SUMMER Has dark gray back and upper wings, except for white trailing edge and dark tips to win… read more

California Gull
Larus californicus

ADULT SUMMER Has gray back and upper wings with white trailing edge and black wingtips with small wh… read more

Mew Gull
Larus canus

ADULT SUMMER Has blue-gray back and upper wings except for white trailing edge and black wingtips wi… read more

Ring-billed Gull
Larus delawarensis

ADULT SUMMER Has pale gray back and upper wing, except for white-spotted black wingtips and pale tra… read more

Lesser Black-backed Gull
Larus fuscus

ADULT SUMMER Has dark gray back and upper wings. Black wingtips are appreciably darker than rest of … read more

Glaucous-winged Gull
Larus glaucescens

ADULT SUMMER Has pale bluegray back and upper wings with white trailing edge and white "windows" on … read more

Iceland Gull
Larus glaucoides

ADULT SUMMER Has a pale gray back and upper wings with a white trailing edge and pale gray subtermin… read more

Heermann's Gull
Larus heermanni

ADULT SUMMER Has dark gray upperparts and paler gray underparts including neck. Head is white, bill … read more

Glaucous Gull
Larus hyperboreus

ADULT SUMMER Has very pale gray back and upper wings with white trailing edge and wingtips. Plumage … read more

Great Black-backed Gull
Larus marinus

ADULT SUMMER Has mostly uniformly dark back and upper wings (wingtips sometimes appear very marginal… read more

Western Gull
Larus occidentalis

ADULT Has dark gray back and upper wings, except for white trailing edge and black wingtips with whi… read more

Bonaparte's Gull
Larus philadelphia

ADULT SUMMER Has pale gray back and upper wings, white underparts and neck, and blackish hood. Bill … read more

Franklin's Gull
Larus pipixcan

ADULT SUMMER Has mainly dark gray back and upper wings, with white trailing edge and black and white… read more

Common Black-headed Gull
Larus ridibundus

Adult has white leading edge to wing and dark trailing edge to outer upper wing. Has a dark brown ho… read more

Thayer's Gull
Larus thayeri

ADULT SUMMER Has pale gray back and upper wings with white trailing edge and black primaries with lo… read more

Ivory Gull
Pagophila eburnea

Adult has pure white plumage, with black legs and eye, and yellow-tipped blue bill. First-winter is … read more

Ross's Gull
Rhodostethia rosea

Adult has pale gray back and upper wing, gray underwings, and otherwise mostly white plumage, includ… read more

Red-legged Kittiwake
Rissa brevirostris

Adult recalls Black-legged Kittiwake, but has bright red legs. Compared to Black-legged, adult's yel… read more

Black-legged Kittiwake
Rissa tridactyla

ADULT SUMMER Has pale gray back and upper wings, except for white trailing edge and well-defined bla… read more

Black Skimmer
Rynchops niger

ADULT SUMMER Has mainly black upper wings and back, continuous with black cap and back of neck; fore… read more

Long-tailed Jaeger
Stercorarius longicaudus

ADULT Uniform gray-brown on back and upperside of inner wing, contrasting with dark outer half of wi… read more

South Polar Skua
Stercorarius maccormicki (Catharacta maccormicki)

ADULT Dark morph has subtly streaked dark brown plumage, apart from white wing "blazes," and paler n… read more

Parasitic Jaeger
Stercorarius parasiticus

ADULT Pale phase has a whitish neck, breast, and belly, with variable yellow flush on cheeks and nec… read more

Pomarine Jaeger
Stercorarius pomarinus

ADULT Pale morph has dark wings (except for white "flash" at base of primaries) and tail. Head has d… read more

Great Skua
Stercorarius skua (Catharacta skua)

ADULT Dark morph has dark brown plumage overall, with rufous-buff tips to many feathers. Note the wh… read more

Aleutian Tern
Sterna aleutica

Adult recalls much more numerous Arctic, but back and upper wings are uniformly darker gray (without… read more

Bridled Tern
Sterna anaethetus

Similar to Sooty Tern, with mostly white underparts, except for contrastingly dark flight feathers, … read more

Least Tern
Sterna antillarum

ADULT SUMMER Has gray back and upper wings and mainly black cap, although forehead is white; plumage… read more

California Least Tern
Sterna antillarum browni

9" (22 cm). California's smallest tern. Summer: back and wings silvery; neck and underparts white; c… read more

Caspian Tern
Sterna caspia

ADULT summer Has pale gray back and upper wing and mainly white underparts. In flight, however, note… read more

Elegant Tern
Sterna elegans

ADULT SUMMER Has pale gray upperparts, black, crested crown and whitish underparts, palest on head a… read more

Forster's Tern
Sterna forsteri

ADULT SUMMER Has mainly pale gray back and upper wings, black cap, and otherwise white plumage. Legs… read more

Sooty Tern
Sterna fuscata

Adult has mostly white underparts, with subtly darker flight feathers, and mostly black upperparts, … read more

Common Tern
Sterna hirundo

ADULT SUMMER Has gray upperparts, black cap, and whitish gray underparts. Compared to Arctic, note b… read more

Royal Tern
Sterna maxima

ADULT SUMMER Pale gray above and whitish below, palest on head and neck. Has a black cap and, in fli… read more

Gull-billed Tern
Sterna nilotica

ADULT summer Has pale gray upperparts, black crown and nape, and white underparts. In flight, wings … read more

Arctic Tern
Sterna paradisaea

ADULT SUMMER Has gray upperparts, with black cap; underparts are palest on throat and cheeks and dar… read more

1-40 of 42 Birds page: 1  | 2

 

 

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