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)

gbbg rings
gbbg PDF's

gbbg 1cy August
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gbbg 2cy January
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Great Black-backed Gull (Larus marinus) sub-adult, October 01 2001, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E).

Primary p8 fully grown. Note the extensive black bill-band, the variegated pattern in the central tertials and the brown lesser coverts. New primaries show bold white tips. Might also be 3cy.