Black-tailed Gull (crassirostris) / ウミネコ / 괭이갈매기

(last update: December 2015)

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

Black-tailed Gull (crassirostris) adult, March 28 2014, Japan. Picture: Eriko Japan.

Please visit Eriko's photostream on Flickr.

Left bird has a brown wash over coverts and tertials, and lacks primary tips; maybe it is not a full adult?