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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Herring Gull argenteus (hybrid) 0.V 2CY, March 03 2023, Almere - De Vaart, the Netherlands. Picture: Eric Roeland.

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

Tibia R-0V and metal NLA 5.620.236, ringed as pullus Larus cachinnans (and hybrids of that kind) on May 13 2022 at De Kreupel, Holland (5247.00 N 513.00 E). Ringer Leon Kelder.

Recoveries:
02-10-2022 Egmond aan Zee (Strand), Noord-Holland, NL 5.237,00 N 437,00 E colourring read Aad van der Ent
03-03-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
18-04-2023 Onderdijk (Vooroever), Noord-Holland, NL 5.244,00 N 508,00 E colourring read Leon Kelder
01-11-2023 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
20-02-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read T. Horst & M. Muusse
16-03-2024 Wervershoof (Vooroever), Noord-Holland, NL 5.245,00 N 507,00 E colourring read Jeroen van Assema

Bird from De Kreupel, nest C5 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 72.7 51.8 2 eggs
B-egg 74.1 52.8
 
29-4-2022 Adult trapped Caspian x Herring 6214033 Red 0.A 441 123.5 57.5 933 71.4 17.8 1064
13-5-2022 3 pulli in nest 5620234 Red 0.T 55.0 98
5620235 Red 0.U 55.1 101
5620236 Red 0.V 50.9 70

below: Herring Gull argenteus (hybrid) 0.V 2CY, March 03 2023, Almere - De Vaart, the Netherlands. Picture: Eric Roeland.

Phenotycis of Herring Gull, but may be F2-hybrid offspring of Herring Gull x caspian gull.