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) JE186 adult, August 25 2012, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.

Bird ringed as breeding adult male in Katholm, Norborg, Syddanmark, Denmark (54°58'16"N 009°49'49"E), ringed on May 04 2011. Apparently, this bird can not decide where to spend the period outside the breeding area: England or France? Recoveries:

24.08 2011 Le Portel beach, Pas-de-Calais, France 50°42'48"N 001°34'06"E
05.01 2012 Dungeness, Kent, Great Britain 50°55'29"N 000°56'34"E
25.01 2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France 50°43'34"N 001°35'04"E
05.05 2012 Katholm, Syddanmark, Denmark 54°58'18"N 009°49'48"E
15.08 2012 Dungeness, Kent, Great Britain 50°55'00"N 000°55'00"E
18.08 2012 Le Portel beach, Pas-de-Calais, France 50°42'48"N 001°34'06"E
21.08 2012 Dungeness, Kent, Great Britain 50°55'00"N 000°55'00"E
25.08.2012 Boulogne-sur-Mer harbour, Pas-de-Calais, France.

Moult score: P6/P9.