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

(last update: December 2015)

Black-tailed Gull (crassirostris) sub-adult, February 04 2011, Off coast Nagasaki prefecture, Japan. Picture: John Wright.

Please visit John's photostream on Flickr.

Bird with large black centres on the secondaries, tiny primary tips and washed-out brown greater primary coverts. Indications for immaturity, probably 3rd cycle (4CY).