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

(last update: December 2015)

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

Black-tailed Gull (crassirostris) 2CY, July 05 2014, Matsuhama - Niigata, Japan. Picture: Masayuki Kurose.

Please visit Masayuki's photostream on Flickr.

Bird in complete moult: P1-P5 new 2nd gen, P7-P10 old juvenile. The brown juvenile flight feathers will be replaced for 2nd generation feathers.