Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)

Great Black-backed Gull (Larus marinus) JW209 2011-2016, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

Bird ringed in Denmark: Kjølpen, Nordjylland, Denmark (57°28'23"N 010°36'16"E), ringed on July 01 2010.

History:
01.07.2010 - pull - Kjølpen, Nordjylland, Denmark - 57°28'23"N 010°36'16"E
01.09.2010 au 05.11.2010 - Hirtshals Havn, Husmorstranden, Nordjylland, Denmark - 57°35'43"N 009°57'26"E
12.12.2010 - Visserijdok, Oostende, West-Vlaanderen, Belgium - 51°14'00"N 002°56'00"E
19.02.2011 - Bassin de la Liane, Outreau, Pas-de-Calais, France - 50°42'21"N 001°36'33"E 
01.03.2011 - Boulogne-sur-Mer harbour, Pas-de-Calais, France - 50°43'34"N 001°35'04"E
19.03.2011 - Boulogne-sur-Mer harbour, Pas-de-Calais, France - 50°43'34"N 001°35'04"E 
15.05.2011 - Boulogne-sur-Mer harbour, Pas-de-Calais, France -50°43'34"N 001°35'04"E 
28.05.2011 - Boulogne-sur-Mer harbour, Pas-de-Calais, France - 50°43'34"N 001°35'04"E 
07.09.2011 - Digue du Braek, Dunkerque, Nord, France - 51°03'06"N 002°18'30"E 
03.10.2011 - Boulogne-sur-Mer harbour, Pas-de-Calais, France - 50°43'34"N 001°35'04"E 
19.11.2011 - Boulogne-sur-Mer harbour, Pas-de-Calais, France - 50°43'34"N 001°35'04"E 
16.01.2012 - Wimereux Plage, Pas-de-Calais, France - 50°46'18"N 001°36'06"E 
13.02.2012 - Bassin de la Liane, Outreau, Pas-de-Calais, France - 50°42'21"N 001°36'33"E 
23.10.2012 - Boulogne-sur-Mer harbour, Pas-de-Calais, France - 50°43'34"N 001°35'04"E 
15.05.2013 au 02.07.2013 - Hirtshals, Nordjylland, Denmark - 57°35'40"N 009°57'40"E
18.08.2013 - Le portel , Pas-de-Calais, France - 50°43'25"N 001°34'00"E
28.08.2013 - Boulogne-sur-Mer harbour, Pas-de-Calais, France - 50°43'34"N 001°35'04"E
04.09.2013 - Boulogne-sur-Mer Plage, Pas-de-Calais, France
02.01.2014 - Boulogne-sur-Mer Port, Pas-de-Calais, France
18.01.2014 - Boulogne-sur-Mer Port, Pas-de-Calais, France
01.02.2014 - Boulogne-sur-Mer Port, Pas-de-Calais, France
10.03.2014 - Boulogne-sur-Mer Port, Pas-de-Calais, France
04.04.2014 au 24.04.2014 - Hirtshals Havn, Notkajen, Nordjylland, Denmark
08.05.2014 au 30.05.2014 - Hirtshals Havn, Skibsbyggerkajen, Nordjylland, Denmark
01.06.2014 - HIRTSHALS, Nordjylland, Denmark
01.07.2014 - Hirtshals Harbour, Nordjylland, Denmark
04.09.2014 au 16/09/2014 - Boulogne-sur-Mer ,Port, Pas-de-Calais, Fr
21.12.2014 - Boulogne-sur-Mer ,Port, Pas-de-Calais, Fr
01.06.2015 au 12.06.2015 - Hirtshals Havn, Pier 2, Nordjylland, Den
02.07.2015 au 31.07.2015 - Hirtshals Havn, Nordjylland, Den
03.08.2015 au 19.08.2015 - Hirtshals Havn, Vestmolen, Nordjylland, Den
05.09.2015 au 30.09.2015 - Hirtshals Havn, Østmolen, Nordjylland, Den
01.10.2015 au 08.10.2015 - Hirtshals Havn, Beddingskajen, Nordjylland, Den
21.10.2015 - Boulogne-sur-Mer, port, Pas-de-Calais, France
28.10 2015 - Boulogne-sur-Mer Beach.
06.11 2015 - Boulogne-sur-Mer "port"
25.11 2015 - Boulogne-sur-Mer "port"
02.02 2016 - Boulogne-sur-Mer "port"
12.02 2016 - Boulogne-sur-Mer "port"
19.02 2016 - Boulogne-sur-Mer "port"

below: 2cy marinus JW209 May 15 2011, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

Complete moult started, which can be seen in the recently replaced mc and growing upper tertials. Bird probably replacing inner primaries as well.

below: 3cy marinus JW209 October 23 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.

below: 4cy marinus JW209 August 28 2013, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

Obviously, old coverts intermixed. Small moult gap in primaries: P6/P8.

below: 5cy marinus JW209 September 04 2014, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

Moult gap in primaries: P6/P9.

below: 6cy marinus JW209 October 21 2015, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

Moult gap in primaries: P7/P10.

below: 7cy marinus JW209 February 19 2016, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.