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.D adult, April & November - December 2021, De Kreupel & Houten, the Netherlands. Pictures: Merijn Loeve & Herman Bouman.

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

Recoveries for r-KD:
30-07-2021 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
22-11-2021 Houten (Vuiloverslag), Utrecht, NL 5.200,00 N 511,00 E colourring read Herman Bouman
07-12-2021 Houten (Vuiloverslag), Utrecht, NL 5.200,00 N 511,00 E colourring read Herman Bouman
29-04-2022 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Roland-Jan Buijs
30-06-2023 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder

Bird breeding at De Kreupel in 2021: nest L4 on island L. Data for this nest:

date: egg no: width (mm): length (mm): volume (cm3):      comments:
23-4-2021 A 48.4 69.3       2 eggs. Location is Kreupel - L nest 4. One parent trapped at nest.
23-4-2021 B 48.6 70.3      
             

Bird breeding again at De Kreupel in 2022: nest L15 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) Tarsus Gonys Swab no
14-4-2022 A-egg 72.4 49.9 2 eggs
B-egg 71.9 51.1
29-4-2022 3 eggs
Adult trapped, Caspian Gull r-KD 6211439 Red KD 467 139.5 68.4 1145 74,7 19.5 1071
Was ringed at nest in 2021
13-5-2022 3 pulli in nest 5623520 Red 1.W 49.4 62
5623521 Red 1.X 54.9 111
5623522 Red 1.Y 53.6 99
5623521 Red 1.X 207.0 100.6 774 955
5623522 Red 1.Y 205.0 97.3 726 957

below: Caspian Gull cachinnans K.D adult, December 7 2021 Houten (Vuiloverslag), the Netherlands. Pictures: Herman Bouman.

below: Caspian Gull cachinnans K.D adult, November 22 2021 Houten (Vuiloverslag), the Netherlands. Pictures: Herman Bouman.

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

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

r[K.D] and metal NLA 6.211.439, Caspian Gull Larus cachinnans 4+CY male, sub-adult markings on primary coverts indicate 5CY bird.
Wing: 472
Head + Bill: 141,0
Bill: 70,5
Bill height: 19,8
Kodak grey scale: 6,5
Weight: 1145
Moult in primaries: P1-P10 old.