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)

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Great Black-backed Gull (Larus marinus) JP625 1-2cy: November 2012 & April 2013, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.

Ringed as pullus on 28 June 2012 at Flateskjær i Skjernøysund, Mandal, Vest-Agder, Norway (57°59'48"N 007°32'52"E).

History:
31.10 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France 50°43'34"N 001°35'04"E
19.11 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France 50°43'34"N 001°35'04"E
27.11 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France.
03.12 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France
31.03 2013 Boulogne-sur-Mer harbour, Pas-de-Calais, France
06.04 2013 Boulogne-sur-Mer harbour, Pas-de-Calais, France

below: JP625 2cy, April 06 2013, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

Less black on bill now and noice illustration to show extent of winter moult in scapulars between November and April.

below: JP625 1cy, November 27 2012, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.

US: 75-99%, LS: 1-25%, TOT SCAPS: 50-75%. Coverts and tertials juvenile. Note pale bill base.