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2nd winter Slaty-backed Gull Larus schistisagus Sakawagawa-river Odawara Kanagawa Japan, February 15th 2001 2nd winter slaty-backed gulls show  very varied appearance.  Primaries and tail colors are variable from almost black to pale gray-brown.  Greater coverts are uniform brown or barred pale color. オオセグロカモメ第２回冬羽　２００１年２月１５日　神奈川県小田原市酒匂川河口

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