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 2022:
nest y-PNED
nest y-PHSV / r-CG
nest y-P:U60
nest y-X56A
nest y-X71A
nest y-X540
nest y-XCHP
nest w-327:U
nest n-F|N
nest r-6A
nest r-6B
nest r-6C
nest r-CS
nest r-FC
nest w-8Z
nest zy-MT
nest 003
nest 011
nest 012
nest 014
nest 015
nest 017
nest 017B
nest 018
nest 019
nest 021
nest 026
nest 034
nest 035
nest 038
nest 040
nest 044
nest 046
nest 048
nest 053
nest 055
nest 058
nest 060
nest 061Z
nest 062
nest 063
nest 107Z
nest 109
nest 111
nest 112
nest 113
nest 117Z
nest 118Z
nest 123Z
nest 124Z
nest 125Z
nest 126Z
nest 127Z
nest 128Z
nest 129Z
nest 131Z
nest 132 YLG
nest 133
nest 134
nest 135
nest 136
nest 137
nest 138
nest 139
nest 143Z
nest 203
nest 204
nest 207
nest 222Z
nest 227
nest 228Z
nest 229
nest 230Z
nest 231
nest 240Z
nest 244
nest 245Z

Caspian Gull cachinnans C.M 1CY-2CY, May 2022 - April 2023, Lelystad & Markerwadden, the Netherlands. Picture: Maarten Hotting, Mars Muusse & Thijs Horst.

Red tibia ring r[C.M] and metal NLA 5.625.063, ringed as pullus Larus cachinnans at nest 12 on May 09 2022 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs.
ID uncertain in 2022: one parent is unknown, other is partner 2 (same as 2021) and is cachinnans.

Recoveries:
22-07-2022 Markermeer (Marker Wadden), Flevoland, NL 5.235,00 N 522,00 E colourring read Maarten Hotting
21-02-2023 Markermeer (Marker Wadden), Flevoland, NL 5.235,00 N 522,00 E colourring read Camilla Dreef & Maarten Hotting
09-04-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst

Visits and data:
Estimation egg laying: A-egg = April 01 2022. Estimating hatching = April 29 2022.

date:  
12-04-2022 2 adults at nest site.
15-04-2022 egg no: width (mm) length (mm) volume (cm3):  water test on April 15th:  
  A 47,2 76,3 -- 90 - float halfway 3 eggs.
  B 52 75,4 -- 3 mm - float  
  C 51,3 75,4 -- 90 - float halfway  
      sum nest: --    
29-04-2022 egg no:       water test on April 29th:  
  A       6 mm - float 3 eggs.
  B       6 mm - float  
  C       6 mm - float  
09-05-2022   metal darvic 3 pulli, 7 days old    
  pullus 5.625.062 r-C.L      
  pullus 5.625.063 r-C.M      
  pullus 5.625.064 r-C.N      
17-06-2022 2 adults at nest site.
21-06-2022 r-CL, r-CM, r-CN photographed. Healthy juveniles, all 3 flying around.
28-06-2022 r-CL, r-CM, r-CN photographed. Healthy juveniles, all 3 flying around.

below: Caspian Gull cachinnans C.M 2CY, April 09 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans C.M 2CY, February 21 2023, Markerwadden, the Netherlands. Picture: Maarten Hotting.

below: Caspian Gull cachinnans C.M 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst.

r[C.M] cachinnans from nest 12. Picture: June 28th, 2022.
Sibling r[C.L] & r[C.N] also fledged from this nest.

below: Caspian Gull cachinnans C.M 1CY, June 21 2022, Lelystad, the Netherlands. Picture: Mars Muusse & Thijs Horst.

below: Caspian Gull cachinnans C.M 1CY, May 09 2022, Lelystad, the Netherlands. Picture: Mars Muusse.