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 / 2CY March

Late winter birds with the paler feather parts worn and faded. This taxon has limited post-juvenile moult, restricted to the scapular region. Flight feathers, tertials and wing-coverts remain juvenile.

 Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 04 2010, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 28 2008, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 04 2010, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 15 2010, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.
Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.