Slaty-backed Gull (schistisagus) / オオセグロカモメ / 큰재갈매기

(last update: December 2015)
Coordinators:
Kim Seog-min (South Korea)
Hideo Shimura (Japan)
Peter Adriaens (Belgium)
Mars Muusse (Netherlands)

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Slaty-backed Gull (schistisagus) 1st cycle / 1CY October

Juvenile feathers start to wear at the fringes. Some birds start to replace upper scapulars in the post-juvenile moult. These new, 2nd generation feathers differ from adjacent juvenile feathers by the buffish or greyish tone and darker central pattern.

 Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 02 2007, Isohama, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 02 2007, Isohama, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 02 2007, Isohama, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 11 2012, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 11 2012, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 11 2012, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 11 2012, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 02 2007, Isohama, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 09 2011, Chiba Prefecture, Japan. Picture: Seichoudoku.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 02 2007, Isohama, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 13 2012, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 13 2012, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 14 2012, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2012, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2012, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 17 2009, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 20 2011, Chiba Prefecture, Japan. Picture: Seichoudoku.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 20 2011, Chiba Prefecture, Japan. Picture: Seichoudoku.
Slaty-backed Gull (schistisagus) 1st cycle (1CY), October 20 2011, Chiba Prefecture, Japan. Picture: Seichoudoku.