Lesser Black-backed Gull (graellsii & intermedius)

(last update: 29-12-2013 )

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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 Mar-April
lbbg 2cy May
lbbg 2cy June
lbbg 2cy July
lbbg 2cy August
lbbg 2cy September
lbbg 2cy October
lbbg 2cy Nov - Dec

lbbg 3cy Jan-April
lbbg 3cy May
lbbg 3cy June
lbbg 3cy July
lbbg 3cy August
lbbg 3cy September
lbbg 3cy October
lbbg 3cy Nov - Dec

lbbg sub-ad Jan-April
lbbg sub-ad May
lbbg sub-ad June
lbbg sub-ad July
lbbg sub-ad Aug
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 Nov - Dec

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 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.
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.
LBBG 1cy WB4U September 14 2006 Ría de Aviles, Spain. Picture: Delfín González.
juvenile LBBG in September, ringed in the UK.LBBG 1cy 6ZF September 20 2004, La Séguinière, W France. A bird ringed in the UK last summer. Images Alain Fosse.
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. LBBG 1cy RR1S September 30 2012, Madrid, Spain. Photo by Delfín González.
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.
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 1cy 452N September 30 2007, Westkapelle The Netherlands. Picture: Ies Meulmeester. Also as 5cy.
Lesser Black-backed Gull 1cy 770N 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 3CY, 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.

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.
juvenile LBBG in September, ringed in Belgium. LBBG 1cy AMAV September 23 1999, Westkapelle, the Netherlands. A bird ringed in Belgium last summer. Photo by Pim Wolf.
juvenile LBBG in September, ringed in Belgium. LBBG 1cy ATAM September 23 1999, Westkapelle, the Netherlands. A bird ringed in Belgium last summer. Photo by Pim Wolf.
juvenile LBBG in September, ringed in Belgium. LBBG 1cy BAAK September 16 1999, Westkapelle, the Netherlands. A bird ringed in Belgium last summer. Photo by Pim Wolf.
juvenile LBBG in September, ringed in Belgium. LBBG 1cy BCAG September 23 1999, Westkapelle, the Netherlands. A bird ringed in Belgium last summer. Photo by Pim Wolf.
juvenile LBBG in September, ringed in Belgium. LBBG 1cy BFAS 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. LBBG 1cy TWAL 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)LBBG 1cy BLB L-102454 September 02 2003, Westkapelle, the Netherlands. 
juvenile LBBG in September, ringed in Belgium. (77792 bytes)LBBG 1cy BLB L-106159 September 02 2003, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Belgium. (81095 bytes)LBBG 1cy BLB L-106998 September 02 2003, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Belgium. (88248 bytes)LBBG 1cy BLB L-107902 September 02 2003, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Belgium. (74292 bytes)LBBG 1cy BLB L-901162 September 27 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
juvenile LBBG in September, ringed in Belgium. (72883 bytes)LBBG 1cy BLB L-901365 September 17 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
juvenile LBBG in September, ringed in Belgium. (78358 bytes)LBBG 1cy BLB L-901703 September 27 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
juvenile LBBG in September, ringed in Belgium. (88248 bytes)LBBG 1cy BLB L-910625 September 03 2009, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Belgium. (88248 bytes)LBBG 1cy BLB L-910938 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'
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)LBBG 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)LBBG K.AFR 1cy, September 08 2010, Barneveld, the Netherlands.
Lesser Black-backed Gull graellsii 5||F 1CY, September 10 2017, Katwijk, the Netherlands.
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. LBBG 1cy 13 September 21 2008, Madrid, Spain. Photo by Delfín González. Seen many times.
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. LBBG 1cy A7 September 30 2012, Madrid, Spain. Photo by Delfín González.
juvenile LBBG, ringed in the Netherlands. LBBG 1cy DE 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. LBBG 1cy 01 September 06 2010, Madrid, Spain. Photo by Delfín González.
juvenile LBBG, ringed in the Netherlands. LBBG 1cy WY September 01 2006, Erpion, Belgium. Picture Marc Fasol.
LBBG 1cy 5T September 12 2011, Boulogne sur mer, NW France. Picture: Jean-Michel Sauvage.
juvenile LBBG, ringed in the Netherlands. LBBG 1cy SL2 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)LBBG 1cy A14E September 24 2002, Scheveningen, the Netherlands.
juvenile LBBG, ringed in the Netherlands. LBBG 1cy C95 E 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)LBBG 1cy NLA 5.462.831 September 18 2010, Leiden, the Netherlands.
adult graellsii in May, ringed in the Netherlands. (83502 bytes)LBBG 1cy NLA 5.429.306 September 26 2008, IJmuiden, the Netherlands.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)LBBG 1cy NLA 5.424.626 September 26 2008, Noordwijk, the Netherlands.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)LBBG 1cy NLA 5.412.835 September 03 2005, Amsterdam, the Netherlands. Picture Ruud Altenburg.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)LBBG 1cy NLA 5.412.347 September 11 2004, Amsterdam, the Netherlands. Picture Ruud Altenburg.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)LBBG 1cy NLA 5.412.281 September 11 2004, Amsterdam, the Netherlands. Picture Ruud Altenburg.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)LBBG 1cy NLA 5.412.231September 11 2004, Amsterdam, the Netherlands. Picture Ruud Altenburg.
juvenile LBBG in September, ringed in the Netherlands. (59255 bytes)LBBG 1cy  NLA 5.366.174 September 02 2001, Brouwersdam, the Netherlands.
juvenile LBBG in October, ringed in the Netherlands. (111218 bytes)LBBG 1cy NLA 5.364.559September 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)LBBG 1cy NLA 5.xxx.166 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.
2cy intermedius in October, ringed in Norway. (97235 bytes)LBBG 1cy H1N0 September 23 - October 04 2011, Utrecht, the Netherlands. Picture: Frank van der Meer & Herman Bouman.
2cy intermedius in October, ringed in Norway. (97235 bytes)LBBG 1cy H.C11 September 09 2010, Westkapelle, the Netherlands.
2cy intermedius in October, ringed in Norway. (97235 bytes)LBBG 1cy H.C82 September 09 2010, Westkapelle, the Netherlands.
2cy intermedius in October, ringed in Norway. (97235 bytes)LBBG 1cy HN39 September 01 2011, Utrecht, the Netherlands. Picture: Herman Bouman.
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)LBBG 1cy DEH 4304557 September 23 2010, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Germany. (98403 bytes)LBBG 1cy DEH 4285037 September 28 2004, Westkapelle, the Netherlands. Picture Pim Wolf.

Denmark: intermedius
juvenile LBBG in September, ringed in Norway. (110895 bytes)LBBG intermedius 1cy V824 September 10 2009, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Norway. (110895 bytes)LBBG intermedius 1cy V907 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)LBBG intermedius 1cy VK9S 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)LBBG intermedius 1cy VPJ9 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)LBBG intermedius 1cy DKC ?9499 September 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
juvenile LBBG in September, ringed in Denmark. (103609 bytes)LBBG intermedius 1cy DKC 5034754 September 20 2011, Westkapelle, the Netherlands. Picture Maarten van Kleinwee.

Norway: intermedius
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 1cy J40E September 20 2007, Boulogne-sur-mer, NW France. Picture: Jean-Michel Sauvage.
juvenile LBBG in October, ringed in Norway. (131273 bytes)LBBG intermedius 1cy J4MN September 23 2010, Westkapelle, the Netherlands.
juvenile LBBG in October, ringed in Norway. (131273 bytes)LBBG intermedius 1cy J8A0 September 29 2007, Westkapelle, the Netherlands. Picture: Ies Meulmeester.
juvenile LBBG in September, ringed in Norway. (73485 bytes)LBBG intermedius 1cy J8HZ September 09 2010, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Denmark. (103609 bytes)LBBG intermedius 1cy JJ2T September 20 2011, Westkapelle, the Netherlands. Picture Maarten van Kleinwee.
juvenile LBBG in September, ringed in Norway. (73485 bytes)LBBG intermedius 1cy JXJ2 September 10 2009, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Norway. (73485 bytes)LBBG intermedius 1cy JZL0 September 10 2009, Westkapelle, the Netherlands.
juvenile LBBG in September, ringed in Norway. (73485 bytes)LBBG intermedius 1cy J07J September 22 2002, Boulogne/Mer, NW France. A bird ringed in Norway last summer.
juvenile LBBG in September, ringed in Norway. (110895 bytes)LBBG intermedius 1cy JNJU September 17 2004, Westkapelle, the Netherlands. Picture Pim Wolf.
juvenile LBBG, ringed in Norway. (71149 bytes)LBBG intermedius 1cy NOS 4238324 September 22 2002, Boulogne-sur-Mer, NW France.

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.