Great Black-backed Gull (Larus marinus)
(last update: July 12, 2015)
Great Black-backed Gull J8K0 (Larus marinus) 2cy: March 25 2004, IJmuiden, the Netherlands (52.27 N, 4.33 E).
Ringed last summer in Vest-Agder, southern Norway. Juvenile coverts and tertials, remiges and rectrices. Almost all scapulars moulted to second generation. Note extensive black in tail. In general J8K0 is slightly darker than average.
In case you find blue ringed Great Black-backed Gulls, you can send your information to: Lista Ringing Group, Box 171, 4558 Vanse, Norway or on e-mail email@example.com.
CR-Code Dark blue ring with white code: