| Coordinator: Albert de Jong
 Merijn Loeve
 Roland-Jan Buijs
 Thijs Horst
 Leon Kelder
 Mars Muusse
 Home Project InfoInternational trend
 National trend
 Site characteristics
 Breeding biology
 Fecundity
 Food resources
 Nonbreeding season
 Breeding species
 Hybrid scores
 Ring codes
 Future
 |  Herring Gull argenteus B.D  4CY, October 14 2024, Velsen-Noord, the Netherlands. Picture: Mars Muusse.Red  tibia  ring r[B.D] and metal NLA 5.558.471, ringed as pullus Larus argentatus on June 25 2021 in colony De Kreupel, the Netherlands. Ringer: Leon Kelder. Recoveries:28-10-2021 Amsterdam (Albardagracht), Noord-Holland, NL 5.222,00 N 448,00 E colourring read Guido Klerk
 09-08-2023 Velsen (Strand Noordpier), Noord-Holland, NL 5.228,00 N 433,00 E colourring read Fred Cottaar
 14-10-2024 Velsen (Strand Noordpier), Noord-Holland, NL 5.228,00 N 433,00 E colourring read T. Horst & M. Muusse
 22-10-2024 Velsen (Strand Noordpier), Noord-Holland, NL 5.228,00 N 433,00 E colourring read T. Horst & M. Muusse
 08-10-2025 Wijk aan Zee (Strand), Noord-Holland, NL 5.228,00 N 433,00 E colourring read Martijn van Manen
 below: Herring Gull argenteus B.D 4CY, October 14 2024, Velsen-Noord, the Netherlands. Picture: Mars Muusse.
 |