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Gull Question


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A combination of marks;

For the first-cycle bird, you see an all-black bill that is not evidently large or bulbous, the head profile is fairly rounded rather than a long sloping forehead, pink legs, and the wingtips are about the same color as the mantle (although some Thayer's can have darker wingtips), with narrow white edging on the primary tips.

For the adult, a non-massive bill with red gonys mark (no black ring), fairly light-mantled, same head profile mentioned above, pink legs, white-tipped primaries.

 

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