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[Gulls] 烏灰銀鷗(Heuglin's Gull )

Mike,

Is P6 visible? Isn't the black on P4 and P5, while P6 has only recently been dropped, and the new feather is not yet visible?

Geoff

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The bird photographed is a first-winter Black-headed Gull.

Brown-headed has a different wing tip pattern, and pale eyes (among other features).

Geoff

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