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) 2nd cycle / 3CY April - June

Birds in late 2nd cycle plumage. In spring, start of the complete moult, including moult of all flight feathers. This will bring birds in full adult plumage.

Black-tailed Gull (crassirostris) 2nd cycle (3CY), May 30 2010, Tobishima Island, Sea of Japan. Picture: Graham Ekins.