Lesser Black-backed Gull (graellsii & intermedius)

(last update: 14-11-2017 )

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LBBG rings

lbbg 1cy May
lbbg 1cy June
lbbg 1cy July
lbbg 1cy August
lbbg 1cy September
lbbg 1cy October
lbbg 1cy November
lbbg 1cy December

lbbg 2cy January
lbbg 2cy February
lbbg 2cy March
lbbg 2cy April
lbbg 2cy May
lbbg 2cy June
lbbg 2cy July
lbbg 2cy August
lbbg 2cy September
lbbg 2cy October
lbbg 2cy November
lbbg 2cy December

lbbg 3cy January
lbbg 3cy February
lbbg 3cy March
lbbg 3cy April
lbbg 3cy May
lbbg 3cy June
lbbg 3cy July
lbbg 3cy August
lbbg 3cy September
lbbg 3cy October
lbbg 3cy November
lbbg 3cy December

lbbg sub-ad January
lbbg sub-ad February
lbbg sub-ad March
lbbg sub-ad April
lbbg sub-ad May
lbbg sub-ad June
lbbg sub-ad July
lbbg sub-ad August
lbbg sub-ad Sept
lbbg sub-ad Oct
lbbg sub-ad Nov
lbbg sub-ad Dec

lbbg adult January
lbbg adult February
lbbg adult March
lbbg adult April
lbbg adult May
lbbg adult June
lbbg adult July
lbbg adult August
lbbg adult September
lbbg adult October
lbbg adult November
lbbg adult December

first calendar year: September

Year 2000 we did a small survey on juvenile LBBG and moult (n=45). This year the survey was repeated and was done inside the colony in August. For the results, see the Juvenile LBBG August Section. 

By September, the large majority of juvenile LBBG have left the Netherlands and must have moved south towards Portugal. Many of the Dutch juveniles, which were seen moulting the scapulars in the colony (in August) must have joined these migrating groups. Nevertheless, many juveniles can still be found in the Netherlands, but as September progresses, more juveniles from Scandinavian colonies move in. This may be a reason for the "observed stand-still" in moult progress in juveniles: those local juveniles with advanced moult move south and less advanced individuals from Scandinavia fill the open positions or gather in mixed local groups.

Best option to reduce this problem is simultaneous counts throughout the West European coastline, or counts which only involve ringed individuals (thus from certain origin).
The problem of later hatched intermedius, moving into early moulting graellsii-groups is not a problem restricted to juveniles. To get a clear picture about arrested primary moult in autumn in adult graellsii plumage, the best place to look for these adults is probably outside the Netherlands, at the first major stop-over sites in Portugal for instance. It is believed that particularly those adults, which arrest primary moult, may also be keen on migrating south as quick as possible.

Moult score in body feathers of juvenile LBBG 16.09.2000, Maasvlakte, the Netherlands. 
mantle =mantle + scapulars; 
lesser =lesser coverts, 
median = median coverts, 
greater = greater coverts, 
# = number of  individuals. 
Normal pattern: moult in lower neck, followed by mantle, scapulars, coverts. First moulted coverts are the medians.
mantle lesser median greater #
0% 0 0 0 23
10% 0 0 0 3
30% 0 0 0 2
40% 0 0 0 2
50% 0 0 0 1
50% 0 1 0 1
50% 0 3 3 1
60% 0 2 2 1
70% 0 0 0 2
70% 0 2 0 1
75% 0 1 0 2
80% 0 2 1 1
80% 0 2 6 1
90% 0 3 3 1
100% 0 1 0 1
100% 1 6 1 1
100% 3 4 1 1
n = 45 exx.

Images of a few unringed birds, showing the individual variation of inner primaries and tail pattern.

   

 
U.K.: graellsii
Lesser Black-backed Gull graellsii F:235 1CY, September 30 2015, Portimao, Portugal. Picture: Carl Baggott.
Lesser Black-backed Gull graellsii F:325 1CY, September 28 2015, Portimao, Portugal. Picture: Carl Baggott.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii F:461 1CY, September 22 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 2FH5 1CY, September - October 2015, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 3FF7 1CY, September 11 2015, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 3FJ1 1CY, September 22 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 3FL0 1CY, September 07 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 3FL7 1CY, September 13 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 4FJ1 1CY, September 12 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 5FJ4 1CY, September 23 2016, Leça beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 5FK9 1CY-2CY, September 2016 - January 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 7FJ7 1CY, September 22-26 2016, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 8FJ8 1CY, September 16 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii LFLS 1CY, September 06 2013, Comenar Viejo, Madrid, Spain (40°15'41"N 003°38'00"W). Picture: Delfín Gonzalez.
Lesser Black-backed Gull graellsii NUNN 1CY, September 29 2014, Portimao, Portugal. Picture: Carl Baggott.
Lesser Black-backed Gull graellsii R.BRP 1CY, September 16 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii RFR.X 1CY, September 01 2016, Matosinhos Beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii RK.RU 1CY, September 16 2016, Leça Beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 061:D 1CY, September 26-29 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii WB4U 1CY, September 14 2006 Ría de Aviles, Spain. Picture: Delfín González.
juvenile LBBG in September, ringed in the UK.Lesser Black-backed Gull graellsii 6ZF 1CY, September 20 2004, La Séguinière, W France. A bird ringed in the UK last summer. Images Alain Fosse.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 23X:C 1CY, September 22 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 25A:C 1CY, September 13 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 25H:C 1CY, September 29 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 26Y:C 1CY, September 14 2017, Leça beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 28V:C 1CY, September 19 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 7J8:C 1CY, September 30 2015, Portimao, Portugal. Picture: Carl Baggott.
Lesser Black-backed Gull graellsii 8P6:C 1CY, September 16 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii RR1S 1CY, September 30 2012, Madrid, Spain. Photo by Delfín González.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii K+T 1CY, September 15 2017, Matosinhos Beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii L+N 1CY, September 01-12 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii S+L 1CY, September 22 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii S+T 1CY, September 29 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii D+H 1CY, September - October 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii D+K 1CY, September 13-16 2016, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii D+M 1CY, September 02 2016, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii F+K 1CY, September 02 2016, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii J+D 1CY, September 22 2016, Leça Beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii G+N 1CY, August - September 2015, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii M+C 1CY-2CY, September 28 2013 & September 29 2014, Portimao, Portugal. Picture: Carl Baggott.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii M:JB 1CY, September 29 2015, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 133:F 1CY, September 01 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 148:F 1CY, September 22 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 189:F 1CY, September 26 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii N:10A 1CY, September 06-07 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 57 1CY, September 02 2016, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.

France: graellsii
juvenile LBBG in October, ringed in Norway. (131273 bytes)Lesser Black-backed Gull graellsii 452N 1CY, September 30 2007, Westkapelle The Netherlands. Picture: Ies Meulmeester. Also as 5cy.
Lesser Black-backed Gull graellsii 770N 1CY, September 02 2008, Boulogne sur mer, NW France. Picture: Jean-Michel Sauvage.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii R:S4H 1CY, September 06 2013, Comenar Viejo, Madrid, Spain (40°15'41"N 003°38'00"W). Picture: Delfín Gonzalez.
Lesser Black-backed Gull graellsii R:V3E 1CY, September 29 2014, Portimao, Portugal. Picture: Carl Baggott.
Lesser Black-backed Gull graellsii 2:DPL 1CY, September 16 2016, Leça Beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 2:DPS 1CY, September 13-22 2016, Leça Beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 3:CXE 1CY, September 22 2016, Leça Beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 3:DEN 1CY, September - October 2016, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 3:DGE 1CY, September - November 2016, Matosinhos Beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 3:DGG 1CY, September 22-23 2016, Leça Beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 3:DNR 1CY-2CY, September - January 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 3:DRL 1CY, September 02 2016, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 3:DUC 1CY, September 13 - 16 2016, Matosinhos Beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 3:EKV 1CY, September 06-13 2017, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 3:ELH 1CY, September 06-07 2017, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 3:ENP 1CY, September 14 2017, Leça beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 3:ENZ 1CY, September 06-07 2017, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 3:ERB 1CY, September 01 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.

Belgium: 'Dutch intergrade'
Lesser Black-backed Gull graellsii AS0.K 1CY, September 16 2016, Leça beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii A.T0T 1CY, September 02 2016, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii AX0.C 1CY, September 13 2016, Leixões Harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii B.C0A 1CY, September 26 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii B.G0Z 1CY, September 25 2017, Leça beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii B.M0N 1CY, September 06 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii B.V0H 1CY, September 01 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG in September, ringed in Belgium.Lesser Black-backed Gull graellsii AMAV 1CY, September 23 1999, Westkapelle, the Netherlands. A bird ringed in Belgium last summer. Photo by Pim Wolf.
juvenile LBBG in September, ringed in Belgium.Lesser Black-backed Gull graellsii ATAM 1CY, September 23 1999, Westkapelle, the Netherlands. A bird ringed in Belgium last summer. Photo by Pim Wolf.
juvenile LBBG in September, ringed in Belgium.Lesser Black-backed Gull graellsii BAAK 1CY, September 16 1999, Westkapelle, the Netherlands. A bird ringed in Belgium last summer. Photo by Pim Wolf.
juvenile LBBG in September, ringed in Belgium.Lesser Black-backed Gull graellsii BCAG 1CY, September 23 1999, Westkapelle, the Netherlands. A bird ringed in Belgium last summer. Photo by Pim Wolf.
juvenile LBBG in September, ringed in Belgium.Lesser Black-backed Gull graellsii BFAS 1CY, September 30 2000, Westkapelle, the Netherlands. A bird ringed in Belgium last summer. Photo by Pim Wolf.
1cy LBBG, ringed in Belgium. (101631 bytes)Lesser Black-backed Gull graellsii LU.AR 1CY, September 03 2009, Westkapelle, the Netherlands.
1cy LBBG, ringed in Belgium. (101631 bytes)Lesser Black-backed Gull graellsii MYA.V 1CY, September 03 2009, Westkapelle, the Netherlands.
1cy argenteus in August, ringed in Belgium. (90559 bytes)Lesser Black-backed Gull graellsii NYA.R 1CY, September 23 2010, Westkapelle, the Netherlands (51.33N, 03.25E).
juvenile LBBG in September, ringed in Belgium.Lesser Black-backed Gull graellsii SMAY 1CY, September 10 2011, Zeebrugge, Belgium. Picture: Peter Adriaens.
juvenile LBBG in September, ringed in Belgium.Lesser Black-backed Gull graellsii TWAL 1CY, September 21 2011, Westkapelle, the Netherlands. Picture Maarten van Kleinwee.
Lesser Black-backed Gull graellsii ZSA.K 1CY, September - December 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG in September, ringed in Belgium. (81371 bytes)Lesser Black-backed Gull graellsii BLB L-102454 1CY, September 02 2003, Westkapelle, the Netherlands. 
juvenile LBBG in September, ringed in Belgium. (77792 bytes)Lesser Black-backed Gull graellsii BLB L-106159 1CY, September 02 2003, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Belgium. (81095 bytes)Lesser Black-backed Gull graellsii BLB L-106998 1CY, September 02 2003, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Belgium. (88248 bytes)Lesser Black-backed Gull graellsii BLB L-107902 1CY, September 02 2003, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Belgium. (74292 bytes)Lesser Black-backed Gull graellsii BLB L-901162 1CY, September 27 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
juvenile LBBG in September, ringed in Belgium. (72883 bytes)Lesser Black-backed Gull graellsii BLB L-901365 1CY, September 17 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
juvenile LBBG in September, ringed in Belgium. (78358 bytes)Lesser Black-backed Gull graellsii BLB L-901703 1CY, September 27 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
juvenile LBBG in September, ringed in Belgium. (88248 bytes)Lesser Black-backed Gull graellsii BLB L-910625 1CY, September 03 2009, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Belgium. (88248 bytes)Lesser Black-backed Gull graellsii BLB L-910938 1CY, September 03 2009, Westkapelle, the Netherlands.
1cy LBBG, ringed in Belgium. (101631 bytes)Lesser Black-backed Gull graellsii BLB L-913409 1CY, September 23 2010, Westkapelle, the Netherlands.

the Netherlands: 'Dutch intergrade'
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii Y.CMW 1CY, September 29 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
1cy argenteus in August, ringed in Belgium. (90559 bytes)Lesser Black-backed Gull graellsii Y.AMM 1CY, September 23 2010, Westkapelle, the Netherlands (51.33N, 03.25E).
adult intermedius lbbg in October, ringed in Norway. (94818 bytes)Lesser Black-backed Gull graellsii Y.ALX 1cy, September 05 2009, IJmuiden, the Netherlands.
1cy argenteus in August, ringed in Belgium. (90559 bytes)Lesser Black-backed Gull graellsii Y.ADY 1CY, August 13-20 2008, IJmuiden, the Netherlands; September 08 2008 Amsterdam, the Netherlands; February 28 2009, Ciudad Real, Spain. Picture: Gabriel Martín.
1cy argenteus in August, ringed in Belgium. (90559 bytes)Lesser Black-backed Gull graellsii KBAT 1CY, September 04 2007, IJmuiden, the Netherlands.
1cy argenteus in August, ringed in Belgium. (90559 bytes)Lesser Black-backed Gull graellsii KBAX 1CY, September 18 2007, IJmuiden, the Netherlands.
1cy argenteus in August, ringed in Belgium. (90559 bytes)Lesser Black-backed Gull graellsii K.AFR 1cy, September 08 2010, Barneveld, the Netherlands.
Lesser Black-backed Gull graellsii 5||F 1CY, September 10 2017, Katwijk, the Netherlands.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii M||W 1CY, September 29 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii T||2 1CY, September 01 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 0||1 1CY, September 02 2016, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 5||A 1CY, September & November 2016, Torreira beach, Aveiro, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 6||= 1CY, September 16 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii K||9 1CY, September 01 2016, Leça Beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii N||D 1CY, September 23 2016, Leça Beach, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii R||3 1CY, September 30 2016, Westkapelle, the Netherlands.
Lesser Black-backed Gull graellsii R||M 1CY, September 16 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii T||Y 1CY, September - October 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii Z||M 1CY, September 30 2016, Westkapelle, the Netherlands.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii Z||P 1CY, September 03 2016, Utrecht, the Netherlands.
Lesser Black-backed Gull graellsii Z||T 1CY, September 26 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii TF 1CY, September 26 2013, Katwijk, the Netherlands.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii UU 1CY, September 23 2013, Katwijk, the Netherlands.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii 13 1CY, September 21 2008, Madrid, Spain. Photo by Delfín González. Seen many times.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii 0X 1CY, September 29 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii 14 1CY, September 06 2015, Katwijk, the Netherlands.
Lesser Black-backed Gull graellsii 1N 1CY, September 01 2016, Matosinhos Beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 6= 1CY, September 02 2016, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii 98 1CY, September 22 2016, Leça beach, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii 9+ 1CY, September 30 2016, Westkapelle, the Netherlands.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii A7 1CY, September 30 2012, Madrid, Spain. Photo by Delfín González.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii DE 1CY, September 30 2012, Madrid, Spain. Photo by Delfín González.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii F2 1CY, September 16 2015, Rotterdam, the Netherlands. Picture: Merijn Loeve.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii S= 1CY, September 09 2015, Rotterdam, the Netherlands. Picture: Merijn Loeve.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii T1 1CY, September 11 2015, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii 01 1CY, September 06 2010, Madrid, Spain. Photo by Delfín González.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii WY 1CY, September 01 2006, Erpion, Belgium. Picture Marc Fasol.
Lesser Black-backed Gull graellsii 5T 1CY, September 12 2011, Boulogne sur mer, NW France. Picture: Jean-Michel Sauvage.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii SL2 1CY, September 09 1998, Westkapelle, the Netherlands. Ringed in the Netherlands at Maasvlakte this year. Photo by Pim Wolf.
juvenile LBBG, ringed in the Netherlands. (68326 bytes)Lesser Black-backed Gull graellsii A14E 1CY, September 24 2002, Scheveningen, the Netherlands.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii C95 E 1CY, September 27 2003, Amsterdam, the Netherlands.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)Lesser Black-backed Gull graellsii NLA 5.506.555 1CY, September 09 2016, Utrecht, the Netherlands.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)Lesser Black-backed Gull graellsii NLA 5.462.831 1CY, September 18 2010, Leiden, the Netherlands.
adult graellsii in May, ringed in the Netherlands. (83502 bytes)Lesser Black-backed Gull graellsii NLA 5.429.306 1CY, September 26 2008, IJmuiden, the Netherlands.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)Lesser Black-backed Gull graellsii NLA 5.424.626 1CY, September 26 2008, Noordwijk, the Netherlands.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)Lesser Black-backed Gull graellsii NLA 5.412.835 1CY, September 03 2005, Amsterdam, the Netherlands. Picture Ruud Altenburg.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)Lesser Black-backed Gull graellsii NLA 5.412.347 1CY, September 11 2004, Amsterdam, the Netherlands. Picture Ruud Altenburg.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)Lesser Black-backed Gull graellsii NLA 5.412.281 1CY, September 11 2004, Amsterdam, the Netherlands. Picture Ruud Altenburg.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)Lesser Black-backed Gull graellsii NLA 5.412.231 1CY, September 11 2004, Amsterdam, the Netherlands. Picture Ruud Altenburg.
juvenile LBBG in September, ringed in the Netherlands. (59255 bytes)Lesser Black-backed Gull graellsii   NLA 5.366.174 1CY, September 02 2001, Brouwersdam, the Netherlands.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)Lesser Black-backed Gull graellsii NLA 5.364.559 1CY, September 11 2004, Amsterdam, the Netherlands. Picture Ruud Altenburg.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull graellsii NLA x.501.xxx 1CY, September 19 2013, Katwijk, the Netherlands.
juvenile LBBG in September, ringed in the Netherlands. (96331 bytes)Lesser Black-backed Gull graellsii NLA 5.xxx.166 1CY, September 17 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
Germany: transition graellsii - intermedius
2cy intermedius in October, ringed in Norway. (97235 bytes)Lesser Black-backed Gull graellsii HAE54 1CY, September 05 2016, Katwijk, the Netherlands.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii HEAA1 1CY, September 29 2015, Leixões Harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii HN20L 1CY, September 25 2017, Leça beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull graellsii HXX86 1CY, September 29 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
2cy intermedius in October, ringed in Norway. (97235 bytes)Lesser Black-backed Gull graellsii H1N0 1CY, September 23 - October 04 2011, Utrecht, the Netherlands. Picture: Frank van der Meer & Herman Bouman.
2cy intermedius in October, ringed in Norway. (97235 bytes)Lesser Black-backed Gull graellsii H.C11 1CY, September 09 2010, Westkapelle, the Netherlands.
2cy intermedius in October, ringed in Norway. (97235 bytes)Lesser Black-backed Gull graellsii H.C82 1CY, September 09 2010, Westkapelle, the Netherlands.
2cy intermedius in October, ringed in Norway. (97235 bytes)Lesser Black-backed Gull graellsii HN39 1CY, September 01 2011, Utrecht, the Netherlands. Picture: Herman Bouman.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii HN72L 1CY, September 15 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG in September, ringed in Belgium.Lesser Black-backed Gull graellsii H7E5 1CY, September 17 2011, Zeebrugge, Belgium. Picture: Peter Adriaens.
juvenile LBBG in September, ringed in Germany. (98403 bytes)Lesser Black-backed Gull graellsii DEH 4304557 1CY, September 23 2010, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Germany. (98403 bytes)Lesser Black-backed Gull graellsii DEH 4285037 1CY, September 28 2004, Westkapelle, the Netherlands. Picture Pim Wolf.

Denmark: intermedius
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull intermedius V.29E 1CY, September 21 2017, Mira beach, Coimbra, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull intermedius V.67J 1CY, September 21 2017, Mira beach, Coimbra, Portugal. Picture: José Marques.
juvenile LBBG in September, ringed in Norway. (110895 bytes)Lesser Black-backed Gull intermedius V824 1CY, September 10 2009, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Norway. (110895 bytes)Lesser Black-backed Gull intermedius V907 1CY, September 24 2009, Westkapelle, the Netherlands.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull intermedius V.AC1 1CY, September 07 2015, Katwijk, the Netherlands. Danish ring, but bird ringed in Sweden.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull intermedius V.CH5 1CY, September 04 2015, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull intermedius V.EJ4 1CY, September 07 2015, Katwijk, the Netherlands.
juvenile LBBG in September, ringed in Norway. (110895 bytes)Lesser Black-backed Gull intermedius VK9S 1CY, September 20 2011, Westkapelle, the Netherlands. Picture Maarten van Kleinwee.
adult LBBG intermedius in September, ringed in Norway. (95609 bytes)Lesser Black-backed Gull intermedius VL9M 1CY & 5CY, September 2011 & 2015, Westkapelle & IJmuiden, the Netherlands. Picture: Maarten van Kleinwee & Mars Muusse.
juvenile LBBG in September, ringed in Norway. (110895 bytes)Lesser Black-backed Gull intermedius VPJ9 1CY, September 23 2014, Katwijk, the Netherlands. Picture: Frank van der Meer.
Lesser Black-backed Gull intermedius V.RF2 1CY, September 22 2016, Leça beach, Matosinhos, Portugal. Picture: José Marques.
2cy intermedius in October, ringed in Norway. (97235 bytes)Lesser Black-backed Gull intermedius V.VH6 1CY, September 17 2017, Katwijk, the Netherlands.
juvenile LBBG in September, ringed in Denmark. (103609 bytes)Lesser Black-backed Gull intermedius DKC ?9499 1CY, September 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
juvenile LBBG in September, ringed in Denmark. (103609 bytes)Lesser Black-backed Gull intermedius DKC 5034754 1CY, September 20 2011, Westkapelle, the Netherlands. Picture Maarten van Kleinwee.

Norway: intermedius
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull intermedius J051C 1CY, September 22 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull intermedius J126R 1CY, September 20-23 2016, Angeiras & Leça beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull intermedius J212R 1CY, September 13 2016, Leixões Harbour, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in Januari-April, ringed in the U.K. (72074 bytes)Lesser Black-backed Gull intermedius J357U 1CY, September 18 2017, Boulogne-sur-Mer, France. Picture: Jean-Michel Sauvage.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull intermedius J367E 1CY, September 30 2016, Westkapelle, the Netherlands.
Lesser Black-backed Gull intermedius J384E 1CY, September 23 2016, Leça beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull intermedius J636R 1CY, September 16 2016, Matosinhos Beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull intermedius J642R 1CY, September 17 2016, Angeiras Beach, Matosinhos, Portugal. Picture: José Marques.
Lesser Black-backed Gull intermedius J730R 1CY, September 01 2016, Matosinhos Beach, Matosinhos, Portugal. Picture: José Marques.
2cy intermedius in October, ringed in Norway. (97235 bytes)Lesser Black-backed Gull intermedius J995N 1CY, September 05 2016, Katwijk, the Netherlands.
Lesser Black-backed Gull intermedius J40E 1CY, September 20 2007, Boulogne-sur-mer, NW France. Picture: Jean-Michel Sauvage.
juvenile LBBG in October, ringed in Norway. (131273 bytes)Lesser Black-backed Gull intermedius J4MN 1CY, September 23 2010, Westkapelle, the Netherlands.
juvenile LBBG in October, ringed in Norway. (131273 bytes)Lesser Black-backed Gull intermedius J8A0 1CY, September 29 2007, Westkapelle, the Netherlands. Picture: Ies Meulmeester.
juvenile LBBG in September, ringed in Norway. (73485 bytes)Lesser Black-backed Gull intermedius J8HZ 1CY, September 09 2010, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Denmark. (103609 bytes)Lesser Black-backed Gull intermedius JJ2T 1CY, September 20 2011, Westkapelle, the Netherlands. Picture Maarten van Kleinwee.
juvenile LBBG in September, ringed in Norway. (73485 bytes)Lesser Black-backed Gull intermedius JXJ2 1CY, September 10 2009, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Norway. (73485 bytes)Lesser Black-backed Gull intermedius JZL0 1CY, September 10 2009, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Norway. (73485 bytes)Lesser Black-backed Gull intermedius J07J 1CY, September 22 2002, Boulogne/Mer, NW France. A bird ringed in Norway last summer.
juvenile LBBG in September, ringed in Norway. (110895 bytes)Lesser Black-backed Gull intermedius JNJU 1CY, September 17 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
juvenile LBBG, ringed in Norway. (71149 bytes)Lesser Black-backed Gull intermedius NOS 4238324 1CY, September 22 2002, Boulogne-sur-Mer, NW France.

ringed 1CY birds, ringed in winter
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii M:140 1CY, September 25 2017, Leça beach, Matosinhos, Portugal. Picture: José Marques.
ad LBBG in October, ringed in the Netherlands. (60900 bytes)Lesser Black-backed Gull graellsii M:157 1CY, September 15 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.

unringed 1CY birds
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull 1CY, September 17 2013, Katwijk, the Netherlands.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull 1CY, September 17 2013, Katwijk, the Netherlands.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull 1CY, September 08 2013, Katwijk, the Netherlands.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull 1CY, September 17 2013, Katwijk, the Netherlands.
juvenile LBBG, ringed in the Netherlands.Lesser Black-backed Gull 1CY, September 19 2013, Katwijk, the Netherlands.