Lesser Black-backed Gull (graellsii & intermedius)

(last update: May 17 2015)

Lesser Black-backed Gull graellsii RG.AR 2CY, December 29 2015, Matosinhos Beach, Matosinhos, Portugal. Picture: José Marques.

Please visit José's FLICKR PHOTO STREAM and also José Blog "Seabirds Portugal".

OBSERVATION REPORT
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RINGS
Color ring - B[RG.AR]
Metallic ring - L920866
EURING code - 05910 - www.cr-birding.org/node/1063
Right leg (tarsus) - Blue ring with a white 4 alpha code
Left leg (tarsus) - Metallic ring
Ringer - INBO
Age at first ring - Pullus - Date - 2014.07.18
Place where ringed - Zeebrugge, West-Vlaanderen, Belgium
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SPECIES
Type of bird - Larus fuscus
Age & Sexe - Immature - Unknown
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OBSERVATION
Date of the sighting - 29/12/2015 - my sightings/2015 - 1
Place - Matosinhos beach, Matosinhos, Portugal
Coordinates: - 41.176885 – 8.693382
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LIFE HISTORY
Date - Location - Observer
18/07/2014 -Zeebrugge (Voorhaven), West-Vlaanderen, Belgium - INBO
23/10/2015 - Le Portel (Strand), Pas-de-Calais, France - Sauvage, Jean Michel
29/12/2015 - Matosinhos (Strand), Douro Litoral, Portugal - Marques, José

Plumage is odd for pure graellsii, and very bulky headed bird. Could be hybrid offspring from argenteus or michahellis.