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 Herring Gull (glaucescens x smithsonianus) 2nd cycle (3CY), February 08 2009, Sequim, Clallam Co. -Washington, USA. Picture: Steve Mlodinow.

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

Hybrid combo also known as "Cook Inlet Gull". Head shape and tappered body shape indicate Herring Gull but primaries much too pale.