| 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∞
 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. 
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