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) 4CY-6CY JE446 2012, 2013 & 2014, Boulogne sur Mer, France.  Picture Jean-Michel Sauvage.

Bird ringed as pullus on 21 June 2009 pull Røyrholmen, Mandal, Vest-Agder, Norway (57°59'45"N 007°21'47"E).

History:
21.06 2009 - Røyrholmen, Mandal, Vest-Agder, Norway 57°59'45"N 007°21'47"E
18.10 2009 - Le Portel beach, Pas-de-Calais, France 50°42'48"N 001°34'06"E
30.11 2009 - Boulogne-sur-Mer harbour, Pas-de-Calais, France 50°43'34"N 001°35'04"E
12.02 2010 - Boulogne-sur-Mer harbour, Pas-de-Calais
18.06 2010 - Boulogne-sur-Mer beach, Pas-de-Calais
21.07 2010 - Le Portel beach, Pas-de-Calais, France
23.08 2010 - Boulogne-sur-Mer harbour, Pas-de-Calais
31.08 2010 - Boulogne-sur-Mer harbour, Pas-de-Calais
12.09 2010 - Le Portel beach, Pas-de-Calais
11.10 2010 - Le Portel beach, Pas-de-Calais
20.11 2010 - Le Portel beach, Pas-de-Calais
21.01 2011 - Boulogne-sur-Mer beach, Pas-de-Calais
04.07 2011 - Le Portel Beach, Pas-de-Calais
01.08 2011 - Le Portel beach, Pas-de-Calais
29.10 2011 - Le Portel beach, Pas-de-Calais
14.06 2012 - Hirtshals Havn, Havnevagten, Nordjylland, Denmark 57°35'39"N 009°57'45"E
03.10 2012 - Boulogne-sur-Mer harbour, Pas-de-Calais
20.11 2012 - Boulogne-sur-Mer harbour, Pas-de-Calais, France
07.05 2013 - Ballastholmen, Mandal, Vest-Agder, Norway 58°00'10"N 007°23'11"
10.09 2013 - Boulogne-sur-Mer harbour, Pas-de-Calais, France
21.09 2013 - Boulogne-sur-Mer Port, Pas-de-Calais, France
01.10 2013 - Boulogne-sur-Mer Port, Pas-de-Calais, France
08.10 2013 - Boulogne-sur-Mer Port, Pas-de-Calais, France
12.10 2013 - Boulogne-sur-Mer Port, Pas-de-Calais, France
01.11 2013 - Boulogne-sur-Mer Port, Pas-de-Calais, France
12.01 2014 - Boulogne-sur-Mer Port, Pas-de-Calais, France
30.01 2014 - Boulogne-sur-Mer, Pas-de-Calais, France
26.09 2014 - Boulogne-sur-mer, Pas-de-Calais, France
27.09 2014 - Boulogne sur mer "harbour", Pas-de-Calais, France
10 & 11.10 2014 - Boulogne-sur-Mer Port, Pas-de-Calais, France

below: Great Black-backed Gull (Larus marinus) JE446 6CY, October 10-11 2014, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.

P6 fully grown, P9-P10 old. Central GC missing.

below: 5cy JE446 November 01 2013, Boulogne sur Mer, France (50.44 N - 01.35 E).  Picture Jean-Michel Sauvage.

Again black on bill. P7 fully grown.

below: 5cy JE446 September 10 2013, Boulogne sur Mer, France (50.44 N - 01.35 E).  Picture Jean-Michel Sauvage.

No black on bill.

below: 4cy JE446 November 20 2012, Boulogne sur Mer, France (50.44 N - 01.35 E).  Picture Jean-Michel Sauvage.

P8 fully grown. Note development of black on bill.

below: 4cy JE446 October 03 2012, Boulogne sur Mer, France (50.44 N - 01.35 E).  Picture Jean-Michel Sauvage.

Bill colour not fully adult. P6/P9. Note missing central GC, rectrices in active moult. Note old immature lesser coverts. Jean-Michel used Photoshop.