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|A 1CY, May 21 2020, Lelystad, the Netherlands. Picture: Merijn Loeve.

Blue bar tibia ring b[F|A], ringed as pullus Larus cachinnans on May 21 2020 at nest 25 in colony Lelystad, the Netherlands.
ID certain, one partner 4CY Caspian Gull cachinnans with obvious sub-adult patterns, other partner probably 5CY Caspian Gull cachinnans.

datum: egg no: width (mm) length (mm) volume (cm3):   
27-04-2020 A 45,3 70,3 72,64 2 eggs in the nest. Sub-adult Caspian at the lookout.
27-04-2020 B 47,5 68 77,25  
  sum nest: --
21-05-2020 pulli   Nest empty. Two chicks close-by, ringed b[F|A] & b[F|B].