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)

Great Black-backed Gull 3cy September

Primary moult score of 3cy GBBG L. marinus.
September 21 2002 - Boulogne/Mer, NW France (50.43N,01.37E).

Bert-Jan Luijendijk & Mars Muusse.
P7 fully grown 7
P8 fully grown 1
P9 fully grown 0
P10 fully grown 0
n (sample size): 8
m (average): 7,1
SD (stand dev): 0,35

Notes:
m (average) = number of fully grown new 3rd gen primaries. Fully grown score = tip of the feather exceeds the previous feather, even fractionally.
7x P7 fully grown, one bird with retained 2nd gen P10.

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Primary moult score of September 3cy GBBG L. marinus, birds in the section of this website. Ringed birds, (+ unringed in brackets).
P6 fully grown (1) .
P7 fully grown 1 (+7) NOS362734,
P8 fully grown 6 JH5R, JA420, JA640, JE464, JE539, JE576, DKC3092175
P9 fully grown (1) .
P10 fully grown 0 .
n (sample size): 16 .
m (average): 7,4 .
SD (stand dev): 0,73 .

Notes:
m (average) = number of remaining old juvenile primaries.
8x P7 fully grown, one ringed bird with retained juvenile P10 (NOS362734) and two unringed bird..
One bird P6/P9.

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marinus age scored against fully grown new primaries, September 21 2002, Boulogne-sur-Mer, NW France (on the roof).
. p5 new p6 new p7 new p8 new p9 new p10 new m = n = SD =
2nd cy - - 2 6 2 - 8,0 10 0,67
3rd cy - - 7 1 - - 7,1 8 0,35
4th cy - 1 3 - - - 6,8 4 0,25
adult 35 40 - - - - 5,4 82 0,65

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nos362734.jpg (86898 bytes)Great Black-backed Gull (Larus marinus) NOS 362734 3cy: September 24 2004, IJmuiden, the Netherlands.
Mirror on 2nd generation P10 and white 3rd generation tail.
8471j52c.jpg (85052 bytes)Great Black-backed Gull JH5R (Larus marinus) 3cy, September 26 2007, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.
1598.jpg (74227 bytes)Great Black-backed Gull JA420 (Larus marinus) 3cy: September 24 2010, Westkapelle, the Netherlands. Picture: M v Kleinwee.
8471j52c.jpg (85052 bytes)Great Black-backed Gull (Larus marinus) 3cy JA640 September 11 2010, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.
1598.jpg (74227 bytes)Great Black-backed Gull JE464 (Larus marinus) 3cy: September 19 2011, Westkapelle, the Netherlands. Picture: M v Kleinwee.
gbbgGreat Black-backed Gull (Larus marinus) 3cy JE539 September 11 2011, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.
gbbgGreat Black-backed Gull (marinus) 2cy-3cy JE576 September 12 2011 & September 25 2012, Boulogne-sur-Mer, NW France. Picture: Jean-Michel Sauvage.
gbbgGreat Black-backed Gull (Larus marinus) JT477 3cy, September 24 2015, Boulogne-sur-Mer, France. Picture: Jean-Michel Sauvage.
gbbgGreat Black-backed Gull (Larus marinus) JT724 2CY-3CY, February 2015 - September 2016, IJmuiden, the Netherlands.
9101.jpg (76303 bytes)Great Black-backed Gull (Larus marinus) JT811 2CY-3CY, July 2015 - September 2016, Boulogne-sur-Mer, France. Picture: Jean-Michel Sauvage.
7977gbbge703.jpg (97309 bytes)Great Black-backed Gull (Larus marinus) JU754 1CY-3CY, December 2014 - September 2016, IJmuiden, the Netherlands.
gbbgGreat Black-backed Gull (Larus marinus) JZ005 1CY & 3CY, October 2014 & September 2016, Zandvoort & IJmuiden, the Netherlands.
gbbgGreat Black-backed Gull (Larus marinus) 3cy DKC 3092175 September 24 2012, Boulogne sur Mer, France. Picture Jean-Michel Sauvage.
gbbgGreat Black-backed Gull (Larus marinus) NLA 7105682 3cy, September 24 2014, Boulogne sur Mer, France (50.44 N - 01.35 E). Picture Jean-Michel Sauvage.
7662.jpg (51643 bytes)Great Black-backed Gull (L. marinus) 8J9 3rd pre-basic moult (3CY), September 04 2015, High Head, North Truro, Barnstable County, Massachusetts. Picture: Steve Arena.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus), 3CY, September 24 2015, IJmuiden, the Netherlands.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus), 3CY, September 20 2015, IJmuiden, the Netherlands.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus), 3CY, September 20 2015, IJmuiden, the Netherlands.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus), sub-adult, September 24 2015, IJmuiden, the Netherlands.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus), 3CY, September 24 2015, IJmuiden, the Netherlands.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus), 3CY, September 24 2015, IJmuiden, the Netherlands.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus) 3cy: September 23 2011, Scheveningen, the Netherlands.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus) 3cy: September 23 2011, Scheveningen, the Netherlands.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus) 3cy: September 23 2011, Scheveningen, the Netherlands.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus) 3cy: September 23 2011, Scheveningen, the Netherlands.
9149.jpg (76564 bytes)Great Black-backed Gull (Larus marinus) 3cy: September 23 2011, Scheveningen, the Netherlands.