繁殖期成鳥 © Ian Davies eBird S40853387 Macaulay Library ML 82177931
非繁殖成鳥 © Francis Yap
非繁殖成鳥 © Nuno dos Santos
非繁殖成鳥 © Scott Baker
非繁殖成鳥 © Christoph Moning
+ 4
未成鳥 © Nigel Voaden
繁殖期成鳥 © Anonymous
繁殖期成鳥 (with Great Crested Tern) © Balaji P B

小鳳頭燕鷗 Thalasseus bengalensis

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辨識

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Elegant medium-sized tern with a slender yellow-orange bill and black crown. Can be confused with Great Crested Tern; note proportionally longer, more orangey bill on Lesser Crested. Also note gray upperwing, which separates it from Sandwich Tern. Gray rump and tail are diagnostic if seen well. On juveniles, note dull legs, secondaries with dark centers, and a weakly patterned upperwing. Strictly coastal, usually found on beaches and estuaries. Call a noisy “kerrrick.”

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