Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Leon Kelder
Mars Muusse

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Caspian Gull cachinnans F|+ 1CY-2CY, May 2020 - July 2021, Lelystad & Almere, the Netherlands. Picture: Juriaan Rung, Merijn Loeve & Eric Roeland.

Black bar tibia ring n[F|+], ringed as pullus Larus cachinnans on May 21 2020 at nest 014 in colony Lelystad, the Netherlands.
ID certain, both parents are Caspian Gull cachinnans.

datum: egg no: width (mm) length (mm) volume (cm3):  water test on April 27th:  
15-04-2020 A 50,5 76,9 98,74 35 - tip on bottom 3 eggs in nest.
15-04-2020 B 50,4 77,2 98,74 25 - tip on bottom  
15-04-2020 C 50,4 71,8 91,83 15 - tip on bottom  
  sum nest: 289,31
27-4-2020     Certainty about parents, cachinnans.
   
21-05-2020 pullus     Nest empty, with fish. 2 chicks ringed. n[F|=].
21-05-2020 pullus     Nest empty, with fish. 2 chicks ringed. n[F|+].
   
02-06-2020 pulli     n[F|=] together with large juvenile, so nest with 3 juveniles fledged?

below: Caspian Gull cachinnans F|+ 2CY, July 19 2021, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|+ 2CY, February 01 2021, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|+ 1CY, September 30 2020, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|+ 1CY, September 26 2020, Almere, the Netherlands. Picture: Juriaan Rung.

below: Caspian Gull cachinnans F|+ 1CY, May 21 2020, Lelystad, the Netherlands. Picture: Merijn Loeve.