Great Black-backed Gull (Larus marinus)

(last update: October 12, 2011)

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

Great Black-backed Gull (Larus marinus) JP140 1cy-2cy, December 2011 & October 2012, Boulogne sur Mer, France (50.44 N - 01.35 E). 
Picture Jean-Michel Sauvage.

Bird ringed at Kamferhof, Lindesnes, Vest-Agder, Norway (57°59'23"N 007°12'25"E) on July 04 2011.

Observations:
08.08 2011 Hirtshals Havn, Husmorstranden, Nordjylland, Denmark 57°35'43"N 009°57'26"E
05.10 2011 Calais Port, Pas-de-Calais, France 50°57'38"N 001°51'43"E
10.10 2011 Calais Port, Pas-de-Calais, France
12.10 2011 Calais Port, Pas-de-Calais, France
25.10 2011 Boulogne-sur-Mer beach, Pas-de-Calais, France 50°43'54"N 001°35'31"E
30.10 2011 Boulogne-sur-Mer harbour, Pas-de-Calais, France
04.12 2011 Boulogne-sur-Mer harbour, Pas-de-Calais, France JMS
05.01 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France JMS
06.02 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France JMS
18.02 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France JMS
28.02 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France JMS
16.04 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France JMS
11.10 2012 Outreau"bassin de la liane", Pas-de-Calais, France JMS
29.10 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, JMS

below: 1cy marinus JP140 December 04 2011, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

Most of the upper scapulars and half of the lower scapulars replaced for 2nd gen feathers.

below: 2cy marinus JP140 October 29 2012, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

Typical pattern of partial autumn moult, included are upper tertials, inner GC, many MC and random LLC & LC.