| Lesser Black-backed Gull graellsii U||E 2CY, July 18 2017, Leixões harbour, Matosinhos, Portugal. Picture: José Marques.Please visit José's FLICKR PHOTO STREAM and also José Blog "Seabirds Portugal". OBSERVATION REPORT∞
 RINGS
 Color ring - Y[UIIE]
 Metallic ring
 EURING code - 05910 - www.cr-birding.org/node/1197
 Right leg (tibia) - Yellow  ring with a black two alfa code
 Left leg (tibia) - Metallic  ring
 Ringer - Roland-Jan Buijs
 Age at first ring - pullus -  Date - 2016.
 Place where ringed - Holland (probbaly Moerdijk colony)
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 SPECIES
 Type of bird - Larus fuscus
 Age & Sexe - immature -  Unknown
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 OBSERVATION
 Date of the sighting -  18.07.2017 - Time - morning
 - my sightings/2017 - 1 -  total of my sightings: 1
 Place - Leixões harbour,  Matosinhos, Portugal
 Coordinates: - 41.1823988,  -8.6970061
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 LIFE HISTORY
 Date Location Observer
 18.07.2017 - Leixões harbour, Matosinhos, Portugal – José  Marques
 P5/P8. Bird had an extensive post-juvenile moult in the inner coverts and upper tertails. 
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