Adulto (Iceland) © Amanda Guercio eBird S36150206 Macaulay Library ML 55257471
Adulto fora de reprodução (Thayer's) © Brian Sullivan
Adulto fora de reprodução (Iceland) © Amanda Guercio
Primeiro inverno (Iceland) © Luke Seitz
Primeiro inverno (Thayer's) © Brian Sullivan
+ 10
Primeiro inverno (Thayer's) © Brian Sullivan
Primeiro inverno (Thayer's) © Blake Matheson
Segundo inverno (Thayer's) © Blake Matheson
Adulto (Iceland) © Ryan Sanderson
Adulto fora de reprodução (Thayer's) © Alix d'Entremont
Primeiro inverno (Iceland) © David Brown
Primeiro inverno (Thayer's) © Brian Sullivan
Segundo inverno (Iceland) © Daniel Irons
Adulto fora de reprodução (Thayer's) (com Herring Gull) © Daniel Casey

Gaivota-branca Larus glaucoides

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Identificação

FORNECIDA POR MERLIN

Pale, medium-sized gull, smaller and daintier than Glaucous or Herring Gulls. Often looks cute with rounded head and small bill. Extremely variable plumage. Variation is apparently clinal across the Arctic breeding range, from darkest in the west to palest in the east. The palest adults have very pale gray backs and nearly pure white wingtips. The darkest birds, formerly known as Thayer’s Gull, are darker gray above and have blackish wingtips. Young birds range from almost pure white to medium brown, never as dark as Herring Gull. First-year birds usually have a mostly dark bill. Winters along both coasts of North America and in Europe, often near the ocean or on large lakes. Typically found in small numbers among flocks of other large gulls.

FORNECIDA POR MERLIN