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Sandwich tern (Sterna (Thalasseus) sandvicensis). Sevastopol, Crimea, Black Sea. October 11, 2016.
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Sandwich Tern arriving at nest on Inner Farne island off English Northumberland coast.
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Brown-hooded Gull (Larus maculipennis) Adult in basic plumage at Ushuaia, Argentina - February 19, 2006 (www.birdinfo.com)