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) sub-adult, May 16 2009, Matsushimakaigan, Japan. Picture: Tsukacyi.

Please visit Tsukacyi's photostream on Flickr.

Birds in complete moult: P1 has been shed. Two flying birds, one adult bird (right) and one immature bird (left). In this immature bird, note the black centres on the secondaries, the brown wash over the wing-coverts and the dark centres on the primary coverts.