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| Coordinator: Albert de Jong Merijn Loeve Roland-Jan Buijs Thijs Horst Leon Kelder Mars Muusse | Caspian Gull cachinnans 0.17 adult, April 08 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.Tarsus ring y-0.17, ringed as breeding adult Larus cachinnans on April 26 2024 at De Kreupel - island Q, the Netherlands (5247.00 N 513.00 E). Ringer Kees Camphuysen & Leon Kelder. 
 below: Caspian Gull cachinnans 0.17 adult, April 08 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse. | ||||||||||||||||||||||||