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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Site characteristics
Breeding biology
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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.E adult, December 2023 - March 2024, De Kreupel & Amersfoort, the Netherlands. Picture: Erik van Beers, Thijs Horst & Mars Muusse.

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

Red tibia ring R-0E and metal NLA Arnhem 6.214.036, ringed as breeding adult male Larus cachinnans on April 29 2022 at nest L4 on island L. - De Kreupel, Holland (5247.00 N, 513.00 E). Ringer: Roland-Jan Buijs.

Recoveries:
14-12-2023 Amersfoort (Polder Zeldert), Utrecht, NL 5.211,00 N 519,00 E colourring read Erik van Beers
03-03-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
04-03-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse

Data for this nest:

Date: Egg code Height (mm)  Width (mm) Comments Metal NLA Colour ring Wing (mm) Head+ bill (mm) Bill Tarsus Mass (gr) Gonys Swab no
14-4-2022 A-egg 66.5 48.9 3 eggs
B-egg 67.1 50.3
C-egg 70.6 50.2
29-4-2022 3 eggs
Adult trapped, male Caspian Gull 6214036 Red 0.E 457 130.2 60.7 70.5 1112 19.0 1068
13-5-2022 3 pulli in nest 5623502 Red 1.A 51 71.4 242 1106
5623503 Red 1.B 61.0 169 1107
5623504 Red 1.C 64.8 211 1108

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

below: Caspian Gull cachinnans 0.E adult, December 14 2023, 29 2022, Amersfoort, the Netherlands. Picture: Erik van Beers.