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|9 1CY-2CY, May 2020 & December 2021, Lelystad & Westkapelle, the Netherlands. Picture: Merijn Loeve & Ezra Mandemaker.

Black tibia ring n[F|9] and metal NLA 5.552.920, ringed as pullus Larus cachinnans on May 21 2020 at nest 011 in colony Lelystad (Bataviahaven), the Netherlands (5230.00 N 525.00 E) - ringer Roland-Jan Buijs.
ID certain, both parents are Caspian Gull cachinnans.

Recoveries:
30-12-2021 Westkapelle (Vroon van Westkapelle), Zeeland, NL 5.132,00 N 326,00 E colourring read Ezra Mandemaker.

below: Caspian Gull cachinnans F|9 2CY, December 30 2021, Westkapelle, the Netherlands. Picture: Ezra Mandemaker.

below: Caspian Gull cachinnans F|9 1CY, May 21 2020, Lelystad, the Netherlands. Picture: Merijn Loeve.

Visits:

date: egg no: width (mm) length (mm) volume (cm3):  water test on April 27th:  
15-04-2020 A 51,5 70 93,48 50 - tip on bottom 3 eggs in nest.
15-04-2020 B 51,2 74,4 98,20 55 - tip on bottom
15-04-2020 C 51,2 75,2 99,26 85 - tip on bottom  
  sum nest: 290,93
07-05-2020 egg     Fully grown chick died inside the egg.
07-05-2020 pullus     Pullus 4 days old.
07-05-2020 pullus     Pullus 4 days old.
   
21-05-2020 pullus     Nest empty, but 2 chicks near nest and ringed. Pullus n[F|8].
21-05-2020 pullus     Nest empty, but 2 chicks near nest and ringed. Pullus n[F|9].
         
02-06-2020 --     No chicks present. Both parents present.