Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse

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Herring Gull argenteus hybrid C:+ 1CY, July 2025, colony De Kreupel, the Netherlands.

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

Tibia Y-C:+ and metal 5.633.733, ringed as pullus F1-hybrid Larus argentatus x L. cachinnans on May 16 2025 at IJsselmeer (De Kreupel), Noord-Holland, by ringer Leon Kelder.

Recoveries:
13-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & N. Colpaert

Data for nest C14 - 2025.

Metal ring Colour ring Date Species Age Clutch size Location Nest code Ringer Head+Bill Mass Wing Parents
NLA 5633731 y-B:Z 16-5-2025 Herring Gull pullus 3 eggs the Netherlands, De Kreupel - eiland C. C14 Leon Kelder 52,4 76,0
NLA 5633731 y-B:Z 06-6-2025 Herring Gull pullus -- the Netherlands, De Kreupel - eiland C. C14 Leon Kelder
NLA 5633732 y-C:= 16-5-2025 Herring Gull pullus 3 eggs the Netherlands, De Kreupel - eiland C. C14 Leon Kelder 47,9 58,0
NLA 5633732 y-C:= 06-6-2025 Herring Gull pullus -- the Netherlands, De Kreupel - eiland C. C14 Leon Kelder
NLA 5633733 y-C:+ 16-5-2025 Herring Gull pullus 3 eggs the Netherlands, De Kreupel - eiland C. C14 Leon Kelder 54,8 90,0

below: Herring Gull argenteus hybrid C:+ 1CY, July 13 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.