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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.
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| A relatively fresher bird |