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) JY481 2cy, February 10 2013, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.

Ringed as pullus on 30 June 2012 at Græsholm W, Hirsholmene, Frederikshavn, Nordjylland, Denmark (57°29'25"N 010°36'15"E).

History:
08.01 2013 Boulogne-sur-Mer harbour, Pas-de-Calais, France
23.01 2013 Boulogne-sur-Mer harbour, Pas-de-Calais, France
08.02 2013 Boulogne-sur-Mer harbour, Pas-de-Calais, France
10.02 2013 Boulogne-sur-Mer harbour, Pas-de-Calais, France

US: 100%, LS: 1-25%, TOT SCAPS: 50-75%. Coverts and tertials juvenile.