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) JT061 1-2CY, November 2013 & October 2014, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.

Ringed as pullus on June 27 2013 at Tvibolten, Tvedestrand, Aust-Agder, Norway (58°35'44"N 008°57'02"E). Travelling distance 994 Km.

History:
27.06 2013 - Tvibolten, Tvedestrand, Aust-Agder, Norway 58°35'44"N 008°57'02"E 
29.09 2013 - Boulogne-sur-Mer harbour, Pas-de-Calais, France 50°43'34"N 001°35'04"E 
05.10 2013 - Boulogne-sur-Mer harbour, Pas-de-Calais, France 50°43'34"N 001°35'04"E 
11.11 2013 - Boulogne-sur-Mer harbour, Pas-de-Calais, France 50°43'34"N 001°35'04"E 
13.11 2013 - Boulogne-sur-Mer beach, Pas-de-Calais, France 50°43'54"N 001°35'31"E 
22.11 2013 - Boulogne-sur-Mer harbour, Pas-de-Calais, France 50°43'34"N 001°35'04"E 
26.11 2013 - Boulogne-sur-Mer Port
09.12 2013 - Boulogne-sur-Mer Port
25.01 2014 - Boulogne-sur-Mer "Port"
17.02 2014 - Boulogne-sur-Mer ( port de plaisance )
20/21/28.02 2014 - Boulogne-sur-Mer "Port"
09.03 2014 - Le Portel beach, Pas-de-Calais, France 50°42'48"N 001°34'06"E
27.05 2014 - Boulogne sur mer "harbour"
25.06 2014 - Le Portel "beach"
29.07 2014 - Boulogne sur mer "Hub port"
12/26.08 2014 - Boulogne sur mer "Hub port"
26.09 2014 - Boulogne sur mer "harbour"
10.10 2014 - Boulogne-sur-Mer "Port"

below: Great Black-backed Gull (Larus marinus) JT061 2CY, October 10 2014, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.

P10 fully grown, with very faint mirror. Partial autumn moult including upper tertials, innermost and central MC, inner GC, single central LLC.

Great Black-backed Gull (Larus marinus) JT061 1cy, November 22 2013, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.

US=75-99%, LS=0-25%, TOT SCAPS=50-75%. Coverts and tertials juvenile.