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) SVS 9159239 5cy-9cy, March 2012-June 2016, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

Male. Ringed as pullus on 04 June 2008 at NIDINGEN, HALLAND, SWEDEN (57º 18´N 11º 54´E).

History:
2011-07-02 57º 07´N 08º 36´E DENMARK, NORDJYLLAND, THY, HANSTHOLM HAVN [200 km / 266°]
2011-07-03 57º 07´N 08º 36´E DENMARK, NORDJYLLAND, THY, HANSTHOLM HAVN [200 km / 266°]
2011-07-28 57º 07´N 08º 36´E DENMARK, NORDJYLLAND, THY, HANSTHOLM HAVN [200 km / 266°]
2012-03-08 50º 44´N 01º 37´E FRANCE, PAS-DE-CALAIS, BOULOGNE-SUR-MER [990 km / 227°]
2012-11-27 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT [992 km / 227°]
2013-01-23 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT
2013-02-09 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT
2013-03-04 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT
2013-03-05 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT
2013-03-25 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT en couple
2013-03-27 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT en couple
2013-03-28 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT en couple
2013-03-31 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT en couple
2013-04-06 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT en couple
???
31.08.2013 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT
01.10.2013 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT
07.12.2013 50º 44´N 01º 35´E FRANCE, PAS-DE-CALAIS, BOULOGNE SUR MER, PORT
22.09.2014 - Boulogne-sur-mer "port" JMS
12.10.2014 - Boulogne-sur-mer "port" JMS
03.12.2014 BOULOGNE SUR MER, PORT
26.12.2014 BOULOGNE SUR MER, PORT E.Petit Berghem
02.01.2015 BOULOGNE SUR MER, PORT
05.02.2015 BOULOGNE SUR MER, PORT
04.03.2015 BOULOGNE SUR MER, PORTR MER, PORT
05.09.2015 - BOULOGNE SUR MER, PORT
16.09.2015 - BOULOGNE SUR MER, PORT
22.09.2015 - BOULOGNE SUR MER, PORT
10.12.2015 - BOULOGNE SUR MER, PORT
08.01.2016 - BOULOGNE SUR MER, PORT
04.02.2016 - BOULOGNE SUR MER, PORT 
09.03.2016 - BOULOGNE SUR MER, PORT
20.03.2016 - BOULOGNE SUR MER, PORT
09.04.2016 - BOULOGNE SUR MER, PORT
11.06.2016 - BOULOGNE SUR MER, PORT

Distance parcourue : 992 KM.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 9cy, June 11 2016, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

Observed with a swollen head, kind of haematoma, maybe after infection of collision with a car?

below: Great Black-backed Gull (Larus marinus) SVS 9159239 9cy, April 09 2016, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 9cy, March 20 2016, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 9cy, January 08 2016, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

Portret.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 8cy, December 10 2015, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

Always with a fish.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 8cy, September 19 2015, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

Winter head. Many central GC missing.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 8cy, March 04 2015, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

White head.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 8cy, February 05 2015, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

White head.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 7cy, October 12 2014, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

P6 fully grown and P7 of equal length, no old primaries left.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 6cy, December 07 2013, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

Winter plumage.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 6cy, October 01 2013, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

P9-P10 still old. P6 fully grown.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 6cy, August 31 2013, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

P8-P10 still old.

It was still present at Boulogne the first week of April, but then it disappeared during summer, only to return quite early, last day of August. Where has it been in those few months???

below: Great Black-backed Gull (Larus marinus) SVS 9159239 6cy, April 06 2013, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

Less black on bill now.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 6cy, March 04 2013, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

Male.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 6cy, January 23 2013, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

Almost in breeding pluamge. Young adult, probably paired to breed at Boulogne, 927KM from Swedish natal colony.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 5cy, November 28 2012, Boulogne-sur-Mer, France. Picture Jean-Michel Sauvage.

P10 fully grown.

below: Great Black-backed Gull (Larus marinus) SVS 9159239 5cy, March 08 2012, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.

Still some brown feathers in the carpal edge.