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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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 1.1 1CY, May 13 2022, De Kreupel, the Netherlands.

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

Bird from De Kreupel, nest L21 on island L. Data for this nest:

Date: Egg code Height (mm)  Width (mm) Comments Metal NLA Colour ring Wing (mm) Head+ bill (mm) Bill (mm) Mass (gr)
14-4-2022 A-egg 74.6 51.6 1 egg
29-4-2022 3 eggs
13-5-2022 2 pulli, 1 egg hatching 5623525 Red 1.1 59.1 60.0
5623526 Red 1.3 51.6 85.0
20-5-2022 3 pulli in nest 5623525 Red 1.1
5623526 Red 1.3
5623570 Red 3.G 64.7 202
17-6-2022 1 large juvenile, dead in colony 5623570 Red 3.G
1-7-2022 1 large juvenile, dead on island Q 5623526 Red 1.3
20-5 - 26-5 camera trap observations: adult female Caspian Gull
3CY male Caspian Gull partner
sometimes feeding 5 chicks
Caspian Gull r-KG visits the nest
3CY Caspian Gull p-F8 visits the nest
3CY Caspian Gull y-XJCL visits the nest
German Herring Gull y-HXN24 visits the nest
Pullus r-3H in the nest, belongs to nest L19