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Slaty-backed Gull Larus schistisagus            Sakawagawa-river Odawara Kanagawa Japan, January 3rd 2002	a
	adult winter
	a
	adult winter
	adult or sub-adult winter
	sub-adult  probable 4th-winter
	3rd-winter
	a
	sub-adult  4th-winter?
	adult or sub-adult winter
	adult or sub-adult winter
	3rd-winter
	a

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