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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International trend
National trend
Site characteristics
Breeding biology
Fecundity
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Nonbreeding season
Breeding species
Hybrid scores
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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.W 1CY, July 01 2022, De Kreupel, the Netherlands. Picture: Jeroen van Assema.

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

Tibia ring R-0W and metal ring NLA Arnhem 5.620.237, ringed as pullus Larus cachinnans on May 13 2022 at IJsselmeer (De Kreupel), Holland (5247.00 N 513.00 E) - ringer Leon Kelder.

Recoveries:
01-07-2022 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Jeroen van Assema

Bird from De Kreupel, nest C14 on island C. 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 70.0 51.8 2 eggs
B-egg 71.1 51.2
29-4-2022 3 eggs
Adult trapped, Caspian Gull 6214032 Red B= 463,5 136.2 63.9 1172 81.8 19.4 1063
13-5-2022 3 pulli in nest 5620237 Red 0.W 52.8 87
5620238 Red 0.X 59.0 138
5620239 Red 0.Y 57.8 124

below: Caspian Gull cachinnans 0.W 1CY, July 01 2022, De Kreupel, the Netherlands. Picture: Jeroen van Assema.