| Coordinator: Albert de Jong
 Merijn Loeve
 Roland-Jan Buijs
 Thijs Horst
 Leon Kelder
 Mars Muusse
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 |  Caspian Gull cachinnans A / FF  1CY,  July  2024, colony De Kreupel, the Netherlands.
Tibia ring  B/W-FF and metal ring Arnhem NLA 5.639.382 ringed as pullus Larus cachinnans on July 04 2025 at   IJsselmeer (De Kreupel), the Netherlands. Ringer: Leon Kelder. Recoveries:26-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Thijs Horst
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