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) JU137 1st cycle, December 2014 & February - March 2015, IJmuiden, the Netherlands.

CR-Code Black ring with white code: JU137 LBNW(JU137);RBM
Ringing Centre Stavanger Museum (Norway) Ring number 3006642
Species Great Black-backed Gull  Larus marinus
Sex Unknown Age Pullus

Date

Place

Coordinates

Observers

Days/km/°

01.07 2014

Tollakskjæret, Farsund, Vest-Agder, Norway

58°04'01"N 006°52'02"E

Olsen, Knut Sigbjørn

-

18.10 2014

IJmuiden, Haven, Industriestraat, Noord-Holland, The Netherlands

52°27'26"N 004°35'22"E

Verbeek, José

109/640/193

20.12 2014

ijmuiden, Noord-Holland, The Netherlands

52°27'26"N 004°34'59"E

Altenburg, Ruud, Muusse, Mars

172/640/194

below: Great Black-backed Gull (Larus marinus) JU137 1st cycle (1CY), December 20 2014, IJmuiden, the Netherlands.

Lower row of mantle feathers and lower row of scapulars still juvenile. Replaced body feathers on flank, side of breast and head. Otherwise juvenile plumage.

First image, with JU754 in background.

below: Great Black-backed Gull (Larus marinus) JU137 1st cycle (2CY), February 08 2015, IJmuiden, the Netherlands. Picture: Jasper Koster.

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

below: Great Black-backed Gull (Larus marinus) JU137 1st cycle (2CY), March 16 2015, IJmuiden, the Netherlands.

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