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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hybrid Herring Gull argenteus x Caspian Gull cachinnans 0.A adult, April 29 2022 & November 11 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 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 x Caspian Gull cachinnans 0.A adult, November 11 2022, De Kreupel - Q, the Netherlands. Picture: Leon Kelder.