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 3cy April

Under construction

 

8902j43a.jpg (64885 bytes)Great Black-backed Gull J5RP (Larus marinus) 3cy: April 02 2008, Boulogne-sur-Mer, France (50.42 N - 01.34 E). Picture: J-M Sauvage.
1598.jpg (74227 bytes)Great Black-backed Gull JK37 (Larus marinus) 3cy: April 28 2008, Boulogne/Mer, France. Picture: J-M Sauvage.
gbbg3cy9715.jpg (75300 bytes)Great Black-backed Gull (Larus marinus) 3cy: April 19 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). A bird with an ordinary p10 pattern. Note the very obvious inner primaries and the obvious dark second generation tail-band.
gbbg3cy09717.jpg (71582 bytes)Great Black-backed Gull (Larus marinus) 3cy: April 19 2002, Le Portel - Boulogne sur Mer, France (50.42 N - 01.34 E). It would be nice to find out whether this presence of a mirror on p10 is related to breeding latitude or not. Some northern birds may look very delayed in upper-part moult, but can relatively often be found with a mirror on p10.
3932.jpg (57732 bytes)Great Black-backed Gull (Larus marinus) 3cy: April 2001, IJmuiden, the Netherlands (52.27 N, 4.33 E).
Recent replaced feathers are more adult-like in the blackish base and undefined pattern. Note the tail pattern.