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 K.K adult, April 2021, July 2022 & July 2023, De Kreupel, the Netherlands. Pictures: Merijn Loeve, Leon Kelder & 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-KK and metal ring NLA Arnhem 6.211.444, ringed as adult Larus cachinnans on April 23 2021 at IJsselmeer (De Kreupel), Holland (5247.00 N 513.00 E) - ringer Roland-Jan Buijs.

After breeding recoveries:
29-11-2021, Sonzay (dump), Indre-et-Loire, FRANCE (4.730,00 N 28,00 E) - Patrick Derrien
17-06-2022 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder & Maarten Hotting
01-07-2022 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Jeroen van Assema
05-02-2023 Wieringerwerf (Wagenpad), Noord-Holland, NL 5.247,00 N 505,00 E colourring read Bert Winters
01-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
28-07-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E found dead Leon Kelder

Bird from De Kreupel, nest C2-2021 on island C. Data for this nest:

date: egg no: width (mm): length (mm): volume (cm3):      comments:
09-4-2021 A 50.0 72.5       1 cold egg. Location is Kreupel - C nest 2.
23-4-2021 A 50.0 72.2       3 warm eggs. One parent trapped at nest.
23-4-2021 B 51.6 74.0        
23-4-2021 C 49.1 68.9        
             

Again present in 2022: De Kreupel, nest C4-2022 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 Swab no
14-4-2022 A-egg 76.1 51.7 3 eggs
B-egg 75.7 52.6
C-egg 76.6 52.7
13-5-2022 3 pulli in nest, ringed today 5620231 Red 0.P 46 70.7 279 1099
5620232 Red 0.R 50.5 70.0 277 1100
5620233 Red 0.S 50 73.3 307 1101
17-6-2022 1 fledged chick r-0.R, together with parent r- K.K

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

Dead.

below: Caspian Gull cachinnans K.K adult, July 01 2022, De Kreupel, the Netherlands. Picture: Jeroen van Assema.

below: Caspian Gull cachinnans K.K adult, April 23 2021, De Kreupel - C, the Netherlands. Pictures: Merijn Loeve.

Coordinator: Leon Kelder.
Ringers: Roland-Jan Buijs, Leon Kelder & Merijn Loeve.

r[K.K] and metal NLA 6.211.444, Caspian Gull 4+CY.
Wing: 459
Head + Bill: 124,2
Bill: 53,8
Bill height: 18,0
Tarsus: 69,5
Kodak grey scale: 5,5
Weight: 994
Moult in primaries: P1-P10 old.