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)

crassirostris rings
crassirostris PDFs

1CY July-Sept
1CY Oct-Dec

2CY Jan-March
2CY April-June
2CY July-Sept
2CY Oct-Dec

3CY Jan-March
3CY April-June
3CY July-Sept
3CY Oct-Dec

sub-ad Jan-March
sub-ad April-June
sub-ad July-Sept
sub-ad Oct-Dec

adult Jan-March
adult April-June
adult July-Sept
adult Oct-Dec

Black-tailed Gull (crassirostris) juvenile / 1CY June - September

Birds in fresh juvenile plumage and birds in post-juvenile moult by September.

Black-tailed Gull (crassirostris) juvenile, August 15 2013, Daebubuk-dong, South Korea. Picture: socialworker.
Black-tailed Gull (crassirostris) juvenile, June 30 2015, Kanazawa, Ishikawa Prefecture, Japan.
Black-tailed Gull (crassirostris) juvenile, August 08 2013, Hachinohe-shi, Aomori Prefecture, Japan. Picture: Shigeo T.
Black-tailed Gull (crassirostris) 1st cycle (1CY), September 15 2015, Tokyo, Japan. Picture: Yoshihiro Ogawa.
Black-tailed Gull (crassirostris) 1st cycle (1CY), September 26 2016, Chidiwa Unzen city, Nagasaki, Japan. Picture: Nobuo Fukushima.
Black-tailed Gull (crassirostris) juvenile, September 04 2011, Shikotan - Kuril Islands, Sakhalin Oblast, Russia. Picture: Dmitry Kulakov.