Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
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Caspian Gull cachinnans U|G 2CY, February 28 2026, Rotterdam, the Netherlands. Picture: Cas van de Giessen.
Tibia G-U|G and metal NLA 5.641.158, ringed as 1CY male Larus cachinnans on September 08 2025 at IJmuiden (Strand Zuidpier), Holland (5227.34 N 433.03 E).
Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Recoveries:
28-02-2026 Rotterdam (Eiland van Brienenoord), Zuid-Holland, NL 5.153,00 N 431,00 E colourring read Maurits Hooijmeijer & Cas van de Giessen
below: Caspian Gull cachinnans U|G 2CY, February 28 2026, Rotterdam, the Netherlands. Picture: Cas van de Giessen.

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