Great Black-backed Gull (Larus marinus)
(last update: July 12, 2015)
Great Black-backed Gull (Larus marinus) JA615 2cy, 3cy & 4cy: January 2009, March 2010, February & March 2011, Scheveningen, the Netherlands.
CR-Code Black ring with white code:
below: JA615 2cy: January 25 2009, Scheveningen. Picture: Maarten v Kleinwee.
Scapulars replaced, but visible wing-covert and tertials still juvenile.
below: JA615 3cy: March 21 2010, Scheveningen. Picture: Maarten v Kleinwee.
No completely black saddle.
below: JA615 4cy: February 01 2011, Scheveningen. Picture: Theo Muusse.
Third winter in succession at this location.
below: JA615 4cy: March 13 2011, Scheveningen. Picture: Vincent vd Spek.
Mirror on P10, large white spots on outer primaries, but still barred greater coverts.