Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Caspian Gull cachinnans K.+ 1CY-5CY, 2021-2025, De Kreupel - L, the Netherlands. Picture: Leon Kelder, Thijs Horst & Mars Muusse.
Red tibia ring r[K.+] & metal NLA 5.556.733, ringed as pullus Larus cachinnans on May 14 2021 at nest L01 in colony De Kreupel, the Netherlands.
ID is uncertain: both parents are unknown.
Recoveries:
20-05-2021 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E captured by ringer Leon Kelder
08-06-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
15-06-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
08-04-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
13-07-2025 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst, M. Muusse & N. Colpaert
| Date: | details: | |||||
| 9-4-2021 | 2 eggs in nest. | egg no: | width (mm): | length (mm): | volume (cm3): | |
| https://waarneming.nl/observation/210431063/ | A egg | 50.2 | 72.5 | |||
| B egg | 50.7 | 71.2 | ||||
| 23-4-2021 | 3 eggs in nest. | egg no: | width (mm): | length (mm): | volume (cm3): | |
| A egg | 49.9 | 72.2 | ||||
| B egg | 51.2 | 71.2 | ||||
| Attempt to trap breeding adult. Failed. | C egg | 49.9 | 72.9 | |||
| 14-5-2021 | 3 pulli in nest. | metal: | tibia: | mass (gr): | head + bill: | tarsus: |
| https://waarneming.nl/observation/214663458/ | NLA 5.556.731 | Red K.Z | 205 | 65.5 | 41.7 | |
| NLA 5.556.732 | Red K.= | 250 | 67.3 | 43.6 | ||
| NLA 5.556.733 | Red K.+ | 239 | 68.3 | 42.9 | ||
| 20-5-2021 | Only 1 chick found between blocks. | metal: | tibia: | mass (gr): | head + bill: | wing: |
| NLA 5.556.733 | Red K.+ | 547 | 85.6 | 90.0 | ||
| 28-5-2021 | No chicks, but many shit traces. | |||||
| Prey: Rounded Goby 1x https://waarneming.nl/observation/215269092/ | ||||||
below: Caspian Gull cachinnans K.+ 5CY, July 13 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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below: Caspian Gull cachinnans 0.05 adult & K.+ 5CY, April 08 2025, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
