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

Home

Caspian Gull cachinnans hybrid XCHP 1CY-7CY, 2018-2024, Lelystad & Almere, the Netherlands. Picture: Thijs Horst & Mars Muusse.

DEH EA-211894 and y-XCHP, ringed as pullus Caspian Gull (Larus cachinnans) on June 06 2018 in a mixed Caspian Gull colony at Gräbendorfer See - Lausitz, Brandenburg, Germany (51°42'00"N 14°06'00"E).

In 2022 breeding bird at colony Lelystad, the Netherlands with male cachinnans in nest XCHP. Visits and data for this nest:
11-04-2022 XCHP present, low on blocks.
12-04-2022 XCHP & partner present.
15-04-2022 XCHP & partner present.
      length width water test  
29-04-2022 2 eggs A egg 68,1 49,9 float - 2 mm XCHP & sub-adult partner. 2 eggs clutch.
B egg 68,6 51,1 float - 1 mm XCHP is hybrid type (no mirror P9) en 4CY is subad cach type.
09-05-2022 XCHP present. No chicks found.
17-05-2022 metal: darvic: mass: Head + Bill Bill
pullus .5625128 r-51 285 74,4 --
pullus .5625129 r-50 351 77,4 --
22-05-2022 No chicks found.
30-05-2022 metal: darvic: mass: Head + Bill Bill
pullus .5625128 r-51 764 99,5 36,6
pullus .5625129 r-50 861 104,7 41
02-06-2022 y-XCHP & partner present.
21-06-2022 y-XCHP & partner present.
  r50 & r51 swimming and flying south of dam 2.
28-06-2022 y-XCHP & partner present.
  r50 & r51 swimming and flying south of dam 2.
17-07-2022 photographed y-XCHP

below: Caspian Gull cachinnans hybrid XCHP 7CY, January 16 2024, Almere - De Vaart, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans hybrid XCHP 6CY, July 08 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans hybrid XCHP 6CY, April 05 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans hybrid XCHP 6CY, April 05 2023, Lelystad, the Netherlands. Picture: Mars Muusse.

Breeding at the very same spot as last season.

below: Caspian Gull cachinnans hybrid XCHP 5CY, November 07 2022, Westkapelle, the Netherlands.

Iris turning paler, and note again rather short and high bill.

below: Caspian Gull cachinnans hybrid XCHP 5CY, July 17 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans hybrid XCHP 5CY, June 21 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Here it is explained why we consider this bird to be hybrid.

below: Caspian Gull cachinnans hybrid XCHP 5CY, April 11 2022, Lelystad, the Netherlands. Picture: Mars Muusse.

below: Caspian Gull cachinnans hybrid XCHP 4CY, July 27 2021, Oostvaardersdijk - Lelystad, the Netherlands.

below: Caspian Gull cachinnans hybrid XCHP 3CY, July 10 2020, Oostvaardersdijk - Almere, the Netherlands.

below: Caspian Gull cachinnans hybrid XCHP 1CY, December 07 2018, Le Portel, France.

Classic cachinnans in all aspects, at this age.