Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse

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Caspian Gull cachinnans (hybrid) 5.1 1CY-3CY, May 2022 - March 2024, the Netherlands. Picture: Bernadette Balten, Dick Kuipers, Thijs Horst & Mars Muusse.

Red tibia ring r[5.1] and metal NLA 5.625.128, ringed as pullus Larus cachinnans at nest 221 / y[XCHP] on May 17 2022 in colony Lelystad, the Netherlands. Ringer: Albert de Jong / Herman Bouman.
ID certain in 2022, both parents are hybrid Caspian Gull cachinnans: mother is hybrid y[XCHP] from Germany and father is hybrid-type 4CY.

Recoveries:
30-05-2022 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E captured by ringer Albert de Jong
07-08-2022 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Thijs Horst
26-09-2022 Lauwersoog (Haven), Groningen, NL 5.324,00 N 612,00 E colourring read Dick Kuipers
15-02-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
19-10-2023 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Thijs Horst
02-12-2023 Dorkwerd (Dorkwerdersluis), Groningen, NL 5.315,00 N 630,00 E colourring read Bernadette Balten

below: Caspian Gull cachinnans (hybrid) 5.1 3CY, March 20 2024, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans (hybrid) 5.1 3CY, March 19 2024, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans (hybrid) 5.1 2CY, December 02 2023, Dorkwerd, the Netherlands. Picture: Bernadette Balten.

below: Caspian Gull cachinnans (hybrid) 5.1 2CY, October 19 2023, Almere, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans (hybrid) 5.1 2CY, February 15 2023, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans (hybrid) 5.1 1CY, September 26 2022, Lauwersoog, the Netherlands. Picture: Dick Kuipers.

Obvious cachinnans traits in this bird.

below: Caspian Gull cachinnans (hybrid) 5.1 1CY, August 07 2022, Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans (hybrid) 5.1 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

r[5.1] cachinnans hybrid from nest 221 y[XCHP]. Picture: June 28th, 2022.
Fledged. Sibling r[5.0], the 2nd chick, also fledged.

Below: primary pattern nice match to Caspian Gull.

below: Caspian Gull cachinnans (hybrid) 5.1 1CY, June 21 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans (hybrid) 5.1 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.