Great Black-backed Gull (Larus marinus)

(last update: July 12, 2015)

Jean-Michel Sauvage (France)
Morten Helberg (Norway)
Nils Helge Lorentzen (Norway)
Mars Muusse (Netherlands)

Great Black-backed Gull (Larus marinus) BTO J0658 2007, 2012, 2014, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture: Jean-Michel Sauvage.

Bird ringed as pullus on 16 July 2005 at island Burhou near Jersey (Ile Anglo-Normande and puffin reserve, 2 km from Aurigny), in the U.K. Probably a male; seen as a couple, now breeding at Boulogne-sur-Mer (2012). Burhou, Paul Roper & the gulls.

This bird has been recorded at Boulogne on 22.02.2007, 27.02.2007, 10.07.2007 and regularly every winter.

below: BTO 0658 10cy, 29 July 2014, Boulogne sur Mer.

This year 2 chicks.

below: BTO 0658 8cy, 29 February 2012, Boulogne sur Mer.

Forming a pair in the harbour, probably starting to breed here.

below: BTO 0658 3cy, July 10 2007, Boulogne sur Mer.

P6-P10 still old. Note the new feathers, which are plain black.

below: BTO 0658 3cy, February 27 2007, Boulogne sur Mer.