Great Black-backed Gull (Larus marinus)

(last update: October 12, 2011)

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

Great Black-backed Gull J43A (Larus marinus) 2cy: March - August 2003, Boulogne- sur-Mer, France (50.42 N - 01.34 E).

New scapulars are growing in in the lowest row. Note the old juvenile rear lowest scapulars and abraded juvenile tertials. This is an example of 2cy GBBG with all tertials and wing-coverts still juvenile, but worn. By March, primary moult has still not started in 2cy birds.

CR-Code Blue with white code  J43A 
Ringing Centre
Stavanger 
Ringnumber CA20987 
Ringer Nils Helge Lorentzen
Species Great Black-backed Gull (Larus marinus)
Sex
X Age Pull Date 05.07.2002
Place Høgholmen, Lindesnes, Vest-Agder, NORWAY Co-ordinates 58.00 N - 07.12 E

14.01.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
26.02.2003 Le Portel, Pas-de-Calais, FRANCE 50.42 N - 01.35 E
04.03.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
14.03.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
15.03.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
18.03.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
26.03.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
20.04.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
26.04.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
29.04.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
21.05.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
27.07.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
02.08.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
06.08.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
07.08.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
08.08.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
11.08.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
21.08.2003 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
02.06.2004 Ramsgate, Kent, ENGLAND 51.20 N - 01.25 E
03.06.2004 Ramsgate, Kent, ENGLAND 51.20 N - 01.25 E
27.07.2004 Wimereux Plage, Pas-de-Calais, FRANCE 50.46 N - 01.36 E
30.07.2004 Wimereux Plage, Pas-de-Calais, FRANCE 50.46 N - 01.36 E
07.08.2004 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E
25.08.2004 Boulogne-sur-Mer, Pas-de-Calais, FRANCE 50.43 N - 01.37 E

In case you find blue ringed Great Black-backed Gulls, you can send your information to: Lista Ringing Group, Box 171, 4558 Vanse, Norway or on e-mail clifu@c2i.net.

(below) J43A 2cy: March 15 2003, Boulogne- sur-Mer, France (50.42 N - 01.34 E).

(below) J43A 2cy: August 11 2003.

Ringed in Norway (data see below). All wing-coverts and tertials very second generation-like. The recently moulted second generation primaries show small white tips. No old primaries left, new primaries: P1-P7 fully grown.