Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)

Coordinators:
Jean-Michel Sauvage (France)
Morten Helberg (Norway)
Nils Helge Lorentzen (Norway)
Mars Muusse (Netherlands)

Great Black-backed Gull (Larus marinus) JT311 1cy-2cy: November 2013 & January 2014, IJmuiden, the Netherlands.

Probably ringed as pullus in June 2013 in Norway.

below: Great Black-backed Gull (Larus marinus) JT311 1cy: November 08 2013, IJmuiden, the Netherlands. Picture: Peter van de Haar.

US: 75-99%, LS: 1-25%, TOT SCAPS: 25-50%. Tertials and coverts juvenile.

below: Great Black-backed Gull (Larus marinus) JT311 2cy: January 11 2014, IJmuiden, the Netherlands. Picture: Jan Zorgdrager.

US: 100%, LS: 75-99%, TOT SCAPS: 75-99%. Tertials and coverts juvenile.