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)

slaty rings
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Slaty-backed Gull (schistisagus) 1st cycle (2CY), March 12 2012, Choshi, Japan. Picture: Michiaki Ujihara.

Please visit Japanese Gull site for many more pictures!

When tertials tips are worn away, some birds may appear slightly longer winged with more elongated rear end. Small round-headed look in this bird.