Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
Home
Project Info
International trend
National trend
Site characteristics
Breeding biology
Fecundity
Food resources
Nonbreeding season
Breeding species
Hybrid scores
Ring codes
Future |
Caspian Gull cachinnans 4.5 2CY-3CY, 2024-2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Red tibia ring r[4.5] and metal NLA 5.629.604, ringed as pullus Larus cachinnans on April 29 2023 at De Kreupel, Holland (5247.00 N 513.00 E) - ringer Leon Kelder.
Recoveries:
12-05-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder
25-06-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
28-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
19-06-2025 Oostknollendam (De Marken), Noord-Holland, NL 5.230,00 N 449,00 E colourring read Kees Floris
29-06-2025 Jisp (Het Zwet), Noord-Holland, NL 5.230,00 N 449,00 E colourring read Kees Floris
13-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & N. Colpaert
26-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Thijs Horst
below: Caspian Gull cachinnans 4.5 3CY, July 13 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 4.5 2CY, July 28 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.

|