| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
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   | Caspian Gull cachinnans x Herring Gull argenteus hybrid 3|W 1CY,  August - September 2023, the Netherlands. Picture: Jeroen Assema & Leon Kelder.Tibia  G-3|W and metal NLA 5.623.902, ringed as  pullus L. argentatus x L. cachinnans hybrid on May 19 2023 at De Kreupel, Holland (5247.00 N 513.00 E). 
      Ringer  Leon Kelder. Recoveries:23-06-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder
 01-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 02-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 03-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
 21-07-2023 Wervershoof (Vooroever), Noord-Holland, NL 5.245,00 N 507,00 E colourring read Wim de Lange
 26-07-2023 Wervershoof (Vooroever), Noord-Holland, NL 5.245,00 N 507,00 E colourring read Jeroen van Assema
 30-07-2023 Wervershoof (Vooroever), Noord-Holland, NL 5.245,00 N 507,00 E colourring read Jeroen van Assema
 19-11-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
 Relatives in nest are g-3|V, g-3|W & g-3|X. below: Caspian Gull cachinnans x Herring Gull argenteus hybrid 3|W 1CY,  September 21 2023, Wieringermeer, the Netherlands. Picture: Leon Kelder.
 
 below: Caspian Gull cachinnans x Herring Gull argenteus hybrid 3|W 1CY,  August 30 2023, Medemblik, the Netherlands. Picture: Jeroen Assema.
 below: Caspian Gull cachinnans x Herring Gull argenteus hybrid 3|V 1CY,  Julu 21 2023, Medemblik, the Netherlands. Picture: Wim de Langa.
 
 
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