| Coordinator: Albert de Jong
 Merijn Loeve
 Roland-Jan Buijs
 Thijs Horst
 Leon Kelder
 Mars Muusse
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 |  Caspian Gull cachinnans  x Herring Gull argenteus AC / 18  1CY,  June  2024, colony De Kreupel, the Netherlands.
Tibia ring   B/W-18 and metal NLA 5.623.981, ringed as  pullus hybrid L. argentatus x L. cachinnans on June 22 2023 at De Kreupel, Holland (5247.00 N, 513.00 E). 
  by ringer  Leon Kelder. Recoveries:08-08-2023 Tilburg (Leikeven), Noord-Brabant, NL 5.136,00 N 503,00 E colourring read Niels van Pelt
 11-08-2023 Tilburg (Vuilstort), Noord-Brabant, NL 5.136,00 N 504,00 E colourring read Tim Raats
 01-09-2023 Westkapelle (Zeedijk), Zeeland, NL 5.132,00 N 326,00 E colourring read Theo Muusse
 01-09-2023 Westkapelle (Zeedijk), Zeeland, NL 5.132,00 N 326,00 E colourring read Thijs Horst
 02-09-2023 Westkapelle (Zeedijk), Zeeland, NL 5.132,00 N 326,00 E colourring read Roland-Jan Buijs
 27-04-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
 below: Caspian Gull cachinnans  x Herring Gull argenteus AC / 18 1CY,  September 01 2023, Westkapelle, the Netherlands. Picture: Mars Muusse.
 
 
 
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