Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Herring Gull argenteus (hybrid) NLA 5.556.763 1CY & 4CY, 2021 & 2025, colony De Kreupel, the Netherlands. Picture: Leon Kelder, Thijs Horst & Mars Muusse.
Metal ring NLA 5.556.763 ringed as pullus Larus argentatus on May 20 2021 at nest KC 21 in colony De Kreupel, the Netherlands.
ID is uncertain: mother is r-K.C Herring Gull argentatus, and father is unknown.
Pictures of 4CY-April plumage
suggest father to be Caspian Gull.
| Date: | details: | |||||
| 23-4-2021 | 3 eggs in nest. | egg no: | width (mm): | length (mm): | volume (cm3): | |
| C egg | 49.0 | 73.1 | ||||
| A egg | 48.9 | 70.3 | ||||
| B egg | 49.7 | 73.9 | ||||
| Attempt to trap breeding adult. Adult trapped. | metal: | tibia: | wing: | head + bill: | bill: | |
| Adult female Herring Gull argentatus. | NLA 6.211.438 | Red-K.C | 427 | 119.4 | 51.8 | |
| mass: | moult score: | bill height: | grey scale: | Tarsus: & Swob: | ||
| -- | left P1 missing | 18.9 | 3.5 | 65.0 & 1079 | ||
| 14-5-2021 | 1 chick & 1 egg in nest. | metal: | tibia: | mass (gr): | head + bill: | tarsus: |
| https://waarneming.nl/observation/214664184/ | NLA 5.556.741 | r-K.7 | 68 | 48.6 | 28.3 | |
| 20-5-2021 | 2 chicks in nest. | metal: | tibia: | mass (gr): | head + bill: | tarsus: |
| https://waarneming.nl/observation/214711054/ | NLA 5.556.741 | r-K.7 | 200 | 64.5 | -- | |
| NLA 5.556.763 | -- | 91 | 54.2 | 32.2 | ||
below: Herring Gull argenteus (hybrid) NLA 5.556.763 4CY, April 08 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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below: Herring Gull argenteus (hybrid) NLA 5.556.763 1CY, May 20 2021, colony De Kreupel - M, the Netherlands. Picture: Leon Kelder.
