| Coordinators:Albert de Jong
 Leon Kelder
 Roland-Jan Buijs
 Thijs Horst
 Merijn Loeve
 Mars Muusse
 Home Project InfoInternational trend
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 Site characteristics
 Breeding biology
 Fecundity
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 | Caspian Gull cachinnans hybrid 5|= 2CY, February-December  2024, Katwijk &  Ameland, the Netherlands. Picture: Annelies Marijnis, Mars Muusse & Gert-Jan Verbeek.Tibia  G-5|= and metal NLA 5.623.986, ringed as  pullus Larus cachinnans hybrid on June 23 2023 at De Kreupel, Holland (5247.00 N 513.00 E). 
      Ringer  Leon Kelder. Recoveries:
      27-10-2023 Westkapelle (Zeedijk), Zeeland, NL 5.132,00 N 326,00 E colourring read Joop Scheijbeler
 26-02-2024 Katwijk aan Zee (Buitenwatering), Zuid-Holland, NL 5.212,00 N 423,00 E colourring read Mars Muusse
 05-06-2024 Hollum (Sud-West), Ameland, NL 5.325,00 N 537,00 E colourring read GertJan Verbeek
 09-12-2024 Katwijk aan Zee (Buitenwatering), Zuid-Holland, NL 5.212,00 N 423,00 E colourring read Annelies Marijnis
 23-12-2024 Katwijk aan Zee (Binnenwatering), Zuid-Holland, NL 5.213,00 N 425,00 E colourring read Jack van Velzen
 below: Caspian Gull cachinnans hybrid 5|= 2CY, December 09 2024, Katwijk, the Netherlands. Picture: Annelies Marijnis.
 below: Caspian Gull cachinnans hybrid 5|= 2CY, June 05 2024, Hollum - Ameland, the Netherlands. Picture: Gert-Jan Verbeek.
 below: Caspian Gull cachinnans hybrid 5|= 2CY, February 26 2024, Katwijk aan Zee, the Netherlands. Picture:  Mars Muusse.
 
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