| Coordinator: Albert de Jong
 Merijn Loeve
 Roland-Jan Buijs
 Thijs Horst
 Leon Kelder
 Mars Muusse
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 | Caspian Gull cachinnans 55A:U 5CY,  March-April 2025, colony Lelystad & colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.Yellow 55A:U and CZP C107097, ringed as pullus  Larus cachinnans on May  31 2021 at  Dynín (Lhota), Jihočeský kraj, [CZ10], Czechia (49°8N 14°39'E), by ringer: Jaroslav Šimek.
       Recovery data:2021-06-26 | 55A:U | U | 3 | Bošilecký ryb., (Dynín, Lhota), Jihočeský kraj | CZ10 | Czechia | 49.138063; 14.656212 | 0 km | Jaroslav Šimek
 2021-07-03 | 55A:U | U | 3 | Bošilecký ryb., (Dynín, Lhota), Jihočeský kraj | CZ10 | Czechia | 49.136878; 14.656311 | 0 km | Jaroslav Šimek
 2021-07-06 | 55A:U | U | 3 | Bošilecký ryb., (Dynín, Lhota), Jihočeský kraj | CZ10 | Czechia | 49.137558; 14.656062 | 0 km | Jaroslav Šimek
 2021-12-07 | 55A:U | U | 5 | Veenoordkolk, Deventer, Overijssel | NL15 | The Netherlands | 52.23474; 6.16747 | 690 km | Daanjan Wisselink
 2022-01-03 | 55A:U | U | 5 | Havikerwaard, De Steeg, Gelderland | NL06 | The Netherlands | 51.996744; 6.094188 | 683 km | Holmer Vonk
 2022-02-02 | 55A:U | U | - Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.783; 5.539 | 709 km | Tim Raats
 2022-02-11 | 55A:U | U | - Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.784; 5.541 | 709 km | Tim Raats
 2022-02-12 | 55A:U | U | 5 | Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.786; 5.541 | 709 km | Jaap van der Linden
 2023-04-14 | 55A:U | U | - Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.786; 5.541 | 709 km | Tim Raats
 2023-08-18 | 55A:U | U | - Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.786; 5.541 | 709 km | Tim Raats
 2023-09-01 | 55A:U | U | - Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.784; 5.541 | 709 km | Tim Raats
 2023-09-28 | 55A:U | U | - Vossemeerplaat, Kampen, Overijssel | NL15 | The Netherlands | 52.557231; 5.847772 | 726 km | Gerrit Gerritsen
 2023-11-03 | 55A:U | U | - Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.786; 5.541 | 709 km | Tim Raats
 2023-11-03 | 55A:U | U | 7 | Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.785; 5.54 | 709 km | Jaap van der Linden
 2023-12-13 | 55A:U | U | - Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.786; 5.537 | 709 km | Tim Raats
 2024-01-06 | 55A:U | U | - Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.786; 5.541 | 709 km | Tim Raats
 2024-01-12 | 55A:U | U | - Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.786; 5.541 | 709 km | Tim Raats
 2024-05-31 | 55A:U | U | - Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.7845; 5.5435 | 709 km | Jaap van der Linden
 2024-07-07 | 55A:U | U | 9 | Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.784; 5.543 | 709 km | Jaap van der Linden
 2024-08-30 | 55A:U | U | 9 | Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.782; 5.54 | 709 km | Jaap van der Linden
 2024-09-19 | 55A:U | U | 9 | Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.788; 5.544 | 709 km | Jaap van der Linden
 2024-10-26 | 55A:U | U | 9 | Elzenburg, Oss, Noord-Brabant | NL09 | The Netherlands | 51.788; 5.544 | 709 km | Jaap van der Linden
 2025-03-21 | 55A:U | U | 9 | Lelystad, Flevoland | NL09 | The Netherlands | 52.52 5.44 | 748 km | Thijs Horst
 below: Caspian  Gull cachinnans 55A:U 5CY,   April 08 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse..JPG)
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 below: Caspian  Gull cachinnans 55A:U 5CY, March  21 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst. Prospecting? .JPG) 
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