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) 1st cycle / 2CY April - June

Birds in late 1st cycle plumage. In spring, start of the complete moult, including moult of all flight feathers (2nd pre-basic moult).