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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hybrid Glaucous-winged x Western Gull (glaucescens x occidentalis) 1st cycle (1CY), September 16 2010, October 28 2011, Westport - Washington, USA. Picture: Steve Mlodinow.

Please visit Steve's Flickr photostream, for many more images. And also Dave Appleton's blog on hybrids!

The primaries are not dark enough for pure Western Gull on this bird.