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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Nests at De Kreupel 2020
nest r-02P4 20
nest y-X804 20
nest D01 20
nest D02 20
nest D03 20
nest L01 20
nest L02 20
nest L03 20
nest M02 20

Nests at De Kreupel 2021
nest r-02P4 20
nest w-201U 21
nest g-XLHD 21
nest r-KA 21
nest r-KB 21
nest r-KC 21
nest r-KD 21
nest r-KE 21
nest r-KF 21
nest r-KH 21
nest r-KJ 21
nest r-KK 21
nest A01 21
nest C03 21
nest C04 21
nest C06 21
nest D01 21
nest D03 21
nest D05 21
nest D06 21
nest D07 21
nest D08 21
nest E01 21
nest H01 21
nest L01 21
nest L02 21
nest L05 21
nest L06 21
nest L07 21
nest M01 21
nest M04 21
nest M06 21
nest Q01 21

Caspian Gull cachinnans 0.K adult, December 2022 - March 2024, the Netherlands & Germany. Picture: Leon Kelder, Armin Langer, Thijs Horst & Mars Muusse.

You can participate in this project too! Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl

Tibia ring r-0K and metal NLA 6.214.041, ringed as adult male Larus cachinnans on April 29 2022 at nest D5 at De Kreupel, Holland (5247.00 N 513.00 E) - ringer Roland-Jan Buijs.

Recoveries:
10-12-2022 Werl (Vuiloverslag), Nordrhein-Westfalen, DUITSLAND 5.134,00 N 755,00 E colourring read Armin Langer
28-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
03-03-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse

Bird from De Kreupel, nest D5-2022 on island D. Data for this nest:

Date: Egg code Height (mm)  Width (mm) Comments Metal NLA Colour ring Wing (mm) Head+ bill (mm) Bill Mass (gr) Tarsus Gonys Swab no
14-4-2022 A-egg 71.6 51.0 2 eggs
B-egg 69.9 50.9
29-4-2022 3 eggs
Adult trapped, Caspian Gull 6214041 Red 0.K 452 129.2 60.8 1021 69.9 19.8 1076
13-5-2022 3 pulli in nest 5620245 Red 0.4 52.2 88
5620246 Red 0.6 57.3 137
5620247 Red 0.7 58.3 138
17-6-2022 1 large dead juvenile in colony 5620247 Red 0.7

below: Caspian Gull cachinnans 0.K adult, March 04 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 0.K adult, July 28 2023, De Kreupel, the Netherlands. Picture: Leon Kelder.

below: Caspian Gull cachinnans 0.K adult, December 10 2022 Werl, Germany. Picture: Armin Langer.