Slaty-backed Gull Larus schistisagus
26th. Feburary 2001 Sakawagawa-river Odawara Kanagawa Japan

About 10 first winter/summer birds were observed.
3 of them had obviously pink-based bill.
The other's bills looked blackish from a distance,
but most of them had some dull-pink at base.


 
A  relatively fresher bird 
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