Great Black-backed Gull (Larus marinus)
(last update: October 12, 2011)
Great Black-backed Gull (Larus marinus) JTV5 October 2003 & 2004, Westkapelle, the Netherlands (51.33 N - 03.25 E).
Ringed June 22 2001 at Vest-Agder, Norway (58.02N, 07.22E).
CR-Code Blue with white code JTV5 Ringing Centre Stavanger Ringnumber 389415 Ringer Runar Jåbekk
21.06.2002 Zeebrugge, West-Vlaanderen, BELGIUM 51.20 N - 03.12 E Harry Vercruijsse
below: Larus marinus JTV5 3cy: October 11 2003, Westkapelle.
October 2003 primary moult stage: P9 fully grown and P10 at the length of P6. P10 shows an obvious mirror on both webs.
Below: JTV5 (Larus marinus) 4cy, October 10 2004, Westkapelle, the Netherlands (51.33 N - 03.25 E).
Primary P8 fully grown and no old primaries left. Note the black markings on the bill, but otherwise much adult-like. Ringed in Norway.