繁殖期成鳥 © Peter Kaestner eBird S35664265 Macaulay Library ML 57117331
幼鳥 © Lisa Owens
繁殖期成鳥 © Gil Ewing
繁殖期成鳥 © Michael Warner
幼鳥 © Shawn Billerman
+ 2
未成鳥和非繁殖期成鳥 © Santiago Imberti

Swallow-tailed Gull Creagrus furcatus

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辨識

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The antithesis of confusing northern gulls, Swallow-tailed is stunning and distinctive. Breeding adults are mostly pearly gray with a black head, red eyering, pinkish legs, and a pale-tipped bill with a white spot at the base. In flight, note striking three-toned wing pattern with gray, white, and black. Nonbreeding adults have a white head with thick black mascara around the eye. Juveniles similar to nonbreeding adults but darker above with a scaly pattern and an entirely dark bill. Breeds on the Galapagos Islands; highly pelagic for the rest of the year, found in offshore waters as far south as central Chile. Not likely to be seen from land. Forages for squid at night.

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