Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans hybrid J|K 1CY-3CY, 2024-2026, the Netherlands. Picture: Jan Zorgdrager, Thijs Horst & Mars Muusse.
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Tibia G-J|K and metal NLA 5.629.348, ringed as F1 hybride pullus L. cachinnans x argentatus on May 24 2024 at De Kreupel, Holland (5247.00 N 513.00 E). Ringer Leon Kelder.
Recoveries:
12-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
28-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
12-08-2026 IJmuiden (Forteiland), Noord-Holland, NL 5.228,00 N 434,00 E colourring read José Verbeek
23-08-2026 Velsen (Strand Noordpier), Noord-Holland, NL 5.228,00 N 433,00 E colourring read Aad Koot
26-08-2026 IJmuiden (Strand Zuidpier), Noord-Holland, NL 5.227,34 N 433,03 E colourring read Jan Zorgdrager
25-09-2026 IJmuiden (Kennemerstrand), Noord-Holland, NL 5.226,55 N 433,03 E colourring read F. Cottaar & T. Horst
Nest data 2024:
| Date trapped: | Metal code | ... | Tibia: | Colour: | Species: | Age: | Status | Clutch size: | Location: | Fledged: | Nest code: |
| 24-5-2024 | ...5629347 | 1 | J|J | Green | 5927 | 1 | - | 2 | IJsselmeer, Enkhuizen, De Kreupel, eiland Q. | ? | Q31 |
| 24-5-2024 | ...5629348 | 1 | J|K | Green | 5927 | 1 | - | 2 | IJsselmeer, Enkhuizen, De Kreupel, eiland Q. | YES | Q31 |
below: Caspian Gull cachinnans hybrid J|K 3CY, September 25 2026, IJmuiden, the Netherlands. Picture: Thijs Horst.
Streaked head and dark grey upperparts.
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below: Caspian Gull cachinnans hybrid J|K 3CY, August 26 2026, IJmuiden, the Netherlands. Picture: Jan Zorgdrager.
below: Caspian Gull cachinnans hybrid J|K 1CY, July 28 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Very much like Lesser Black-backed Gull in juvenile plumage.
