Lesser Black-backed Gull (graellsii & intermedius)

(last update: May 17 2015)

Lesser Black-backed Gull graellsii K.AZX 2CY-5CY, August 2014 - January 2017, the Netherlands & Portugal. Picture: Maarten van Kleinwee & José Marques.

Continental graellsii from this population are also referred to as 'Dutch intergrade', upperparts between medium grey British graellsii and dark grey Scandinavian intermedius.
Ringed as pullus in June 2013 at Texel, the Netherlands.

OBSERVATION REPORT
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RINGS
Color ring - G[K.AZX]
Metallic ring - 5471440
EURING code - 05910 - www.cr-birding.org/node/546
Right leg (tibia) – Metallic ring
Left leg (tarsus) - Green ring with a white four alpha code
Ringer - Kees Camphuysen
Age at first ring - Juvenile - Date - 14.06.2013
Place where ringed - Valley, Kelderhuispolder, Texel, Holland
∞
SPECIES
Type of bird - Larus fuscus
Age & Sexe - Immature - unknown
∞
OBSERVATION
Date of the sighting - 11.11.2016 - Time - morning
- my sightings/2016 - 4 - total of my sightings: 13
Place - Matosinhos beach, Matosinhos, Portugal
Coordinates: - 41.176885 – 8.693382
∞
LIFE HISTORY
Date Location Observer
14.06 to 11.07.2013 - 9 sightings Valley, Kelderhuispolder, Texel, Holland - C.J. Camphuysen
07.08.2013 - Breakwater, Texel, Holland - Job ten Horn
03;25.08.2013-Texel beach, Texel, Holland - C.J. Camphuysen
02.11.2013-Douro River Estuary, Porto, Portugal - José Vidal
08.11.2013-Leixões harbour, Matosinhos, Portugal - Malcolm Millais
24.11.2013-Matosinhos beach, Matosinhos, Portugal - Vitor Encarnação
27.11-14.12.2013-Matosinhos beach, Matosinhos, Portugal - Inocêncio Oliveira
08;10.04.2014-Matosinhos beach, Matosinhos, Portugal - Inocêncio Oliveira
27.07.2014-Kanaleneiland, Utrecht, Holland - Herman Bouman
09.08.2014-Kanaleneiland, Utrecht, Holland - Caroline Walta
14.08-01.09.2014-Kanaleneiland, Utrecht, Holland - Herman Bouman
12.09.2014-Matosinhos, Portugal - Armando Mota
14.01.2015-Matosinhos beach, Matosinhos, Portugal - José Marques
13,14.02.2015-Leixões harbour, Matosinhos, Portugal - José Marques
21.03.2015-Leixões harbour, Matosinhos, Portugal - José Marques
31.03.2015-Matosinhos beach, Matosinhos, Portugal - José Marques
27.04.2015-industrieterrein Elzenburg, Oss, Holland – Jaap Vd Linden
03.11.2015-Matosinhos,Portugal - Peter Rock, Inocêncio Oliveira e José Marques
20.11.2015-Matosinhos beach, Matosinhos, Portugal - José Marques
01.12.2015-Matosinhos beach, Matosinhos, Portugal - José Marques
11.12.2015-Leixões harbour, Matosinhos, Portugal - José Marques
16.02.2016-Leixões harbour, Matosinhos, Portugal - José Marques
14.10.2016-Matosinhos beach, Matosinhos, Portugal - José Marques
11.11.2016-Matosinhos beach, Matosinhos, Portugal - José Marques
23.12.2016-Matosinhos beach, Matosinhos, Portugal - José Marques
01.01.2017 -Matosinhos beach, Matosinhos, Portugal - Richard Bonser & José Marques

below: Lesser Black-backed Gull graellsii K.AZX 5CY, January 01 2017, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.

Much adult-like in plumage. P10 fully grown.

below: Lesser Black-backed Gull graellsii K.AZX 4CY, December 23 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.

Much adult-like in plumage. P10 fully grown.

below: Lesser Black-backed Gull graellsii K.AZX 4CY, November 11 2016, Matosinhos Beach, Matosinhos, Portugal. Picture: José Marques.

Much adult-like in plumage. P8 fully grown.

below: Lesser Black-backed Gull graellsii K.AZX 4CY, October 14 2016, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.

P7/P10.

below: Lesser Black-backed Gull graellsii K.AZX 3CY, December 04 2015, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.

Much adult-like in plumage. Note bill pattern.

below: Lesser Black-backed Gull graellsii K.AZX 3CY, December 01 2015, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.

Much adult-like in plumage. Note bill pattern. P10 growing.

below: Lesser Black-backed Gull graellsii K.AZX 3CY, November 20 2015, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.

Small primary tips. P9 f.g. Pink base on bill.

below: Lesser Black-backed Gull graellsii K.AZX 3CY, March 21 2015, Leixões port, Matosinhos, Portugal. Picture: José Marques.

below: Lesser Black-backed Gull graellsii K.AZX 3CY, Februray 13 2015, Matosinhos beach, Matosinhos, Portugal. Picture: José Marques.

below: Lesser Black-backed Gull graellsii K.AZX 2CY, August 14 2014, Utrecht, the Netherlands. Picture: Maarten van Kleinwee.

Local bird in complete moult: P7/P10. P1-P7 new 2nd gen fully grown, P8 growing, length at P4, P9 missing, P10 old juvenile. PMS=37. Moult in secs: S1-S3 new 2nd gen, S4-S8 growing, then secs missing, no old juvenile. Rectrices: R1 seems to be a juvenile tail-feather (which is very unusual, normally moult in recs starts at this point and prgresses centrifugal, maybe R1 is old 2nd gen?), other have been shed, now growing 2nd gen.

Probably some coverts were included in post-juvenile moult on wintering grounds, now again replaced for 3rd gen, like GC2.

above: with 4CY michahellis, below with 4CY intermedius yellow V6TE.