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) 2nd cycle / 3CY February

2nd generation flight feathers. In many birds the row of median coverts (and in all birds the new scapulars) reflect the grey tone of adult plumage.

 Slaty-backed Gull (schistisagus) 2nd cycle (3CY), March 28 2008, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 2nd cycle (3CY), March 03 2010, Shibetsu, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 2nd cycle (3CY), March 15 2010, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 2nd cycle (3CY), March 29 2008, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 2nd cycle (3CY), March 18 2010, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 2nd cycle (3CY), March 18 2010, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 2nd cycle (3CY), March 28 2008, Nemuro, Hokkaido, Japan. Picture: Shiroto.
Slaty-backed Gull (schistisagus) 2nd cycle (3CY), February 17 2014, Choshi, Chiba, Japan. Picture: Shiroto.