Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse

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Lelystad 2020:
nest 001
nest 002 yPNED
nest 003
nest 005 yPLDP
nest 006 yPESV
nest 008 gXLDT
nest 009
nest 011
nest 012
nest 013
nest 014
nest 015
nest 016
nest 017
nest 018
nest 021
nest 025
nest 027
nest 028
nest 029
nest 031
nest 032
nest 033
nest 034
nest 035
nest 036
nest 037
nest 038
nest 039
pair A
pair B

Caspian Gull cachinnans F|2 1CY & 5CY, 2020 & 2024, the Netherlands & October 2020, Basque Country. Picture: Merijn Loeve, Xabier Saralegi, Eric Roeland, Thijs Horst & Mars Muusse..

Black bar tibia ring n[F|2] and metal NLA 5.552.914,ringed as pullus Larus cachinnans on May 21 2020 at nest 021 in colony Lelystad (Bataviahaven), the Netherlands. Ringer: Roland-Jan Buijs.
ID certain, Caspian Gull cachinnans; one partner with sub-adult patterns.
Both ringed chicks reported from abroad, quickly after fledging.

Recoveries:
07-08-2020 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Eric Roeland
20-08-2020 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Eric Roeland
02-10-2020 San Sebastián (Urumea river), Gipuzkoa, SPANJE 4.319,00 N 158,00 W colourring read Xabier Saralegi
04-03-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse
19-03-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
22-03-2024 Wervershoof (Vooroever), Noord-Holland, NL 5.245,00 N 507,00 E colourring read Leon Kelder
19-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read T. Horst & M. Muusse & Leon Kelder

datum: egg no: width (mm) length (mm) volume (cm3):  water test on April 15th:  
27-04-2020 A 49,6 68,9 85,34578 30 - angled, tip on bottom 3 eggs in the nest. Male with sub-adult pattern.
27-04-2020 B 49,8 70 87,40901 60 - angled, tip on bottom  
27-04-2020 C 50,1 66,6 84,16842 35 - angled, tip on bottom
  sum nest: 256,9232
21-05-2020 pulli     Two chicks, ringed n[F|2] & n[F|4]. C-egg is unfertile, taken from nest.
         
02-06-2020 pulli     Two partners at nest.

below: Caspian Gull cachinnans F|2 5CY,July 19 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans F|2 5CY, March 04 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans F|2 1CY, October 02 2020, Urumea river - San Sebastian  (43°18'29.5"N 1°58'36.2"W), Basque Country. Picture: Xabier Saralegi.

below: Caspian Gull cachinnans F|2 1CY, August 07 2020, Lelystad, the Netherlands. Picture: Eric Roeland.

After fledging, on it's way south, but now only 10 km's from the colony.

below"Caspian Gull cachinnans F|2 1CY, May 21 2020, Lelystad, the Netherlands. Picture: Merijn Loeve.