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

(last update: December 2015)

Kim Seog-min (South Korea)
Hideo Shimura (Japan)
Peter Adriaens (Belgium)
Mars Muusse (Netherlands)

Slaty-backed Gull (schistisagus) 2nd cycle (2CY), October 02 2007, Isohama, Tsuri-shihama, Japan. Picture: Shigenobu Aizawa.

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Autumn second cycle bird, with 2nd gen flight feathers. Last stage of complete moult, with P9 fully grown, P10 growing. In this laste stage of the complete moult, a subsequent replacement of several wing-coverts and/or upper tertials may be started in some birds; this individual has missing upper TT, inner GC and single inner MC.