Black-tailed Gull Larus crassirostris
Oct. 15th 2004 Tamagawa-river Kawasaki Kanagawa Japan

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Adult winter

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2nd winter

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3rd winter. Note the dull leg/bill color, lack of distinct white spot to the primary tips.

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Adult winter. Grey-brown pigmentation of this species is at its peak in fall.

Adult winter
 
 

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