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.V 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Red tibia ring r[C.V] and metal NLA 5.625.070, ringed as pullus Larus cachinnans at nest 17B on May 09 2022 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs.
ID certain in 2022, both parents are Caspian Gull cachinnans.

Visits and data 2022:
Estimation egg laying: A-egg = April 08 2022. Estimating hatching = May 06 2022.
                 
15-04-2022 A egg 68,1 50,4 tip bottom - 40 2 blue eggs.      
  B egg 65,6 49,7 tip bottom - 40        
  C egg 68,7 50,6 tip bottom - 40        
   
19-04-2022 2 parents present at nest.
   
29-04-2022 A egg     float - 1 mm        
  B egg     float - 1 mm        
  C egg     float - 1 mm        
   
01-05-2022 female is cachinnans.
   
09-05-2022 pullus r-C.V   NLA 5625070        
  pullus r-C.W   NLA 5625071        
  pullus --   NLA 5625072 pullus too small for plastic.
   
    colour   metal mass wing head + bill bill
17-05-2022 pullus r-C.V   NLA 5625070 257      
   
30-05-2022 pullus r-C.V   NLA 5625070 615 175 95,1 39,3
  food: fish is Roach
   
02-06-2022 male alarming.
   
17-06-2022 No birds near nest, r-CW flying around at north side.
   
21-06-2022 No activities near nest, r-CV & r-CW & 3rd chick (only mmetal?) swimming at north side. If so, then 3x chicks fledged from this nest.
   
12-07-2022 R-CV & r-CW photographed.
                 
17-05-2022 R-CW photographed.

below: Caspian Gull cachinnans C.V 1CY, July 12 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

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

r[C.V] cachinnans from nest 17B. Picture: June 21st, 2022.
Fledged. Sibling r[C.W] also fledged. Unringed bird in the group is probably 3rd sibling from nest 17B, also fledged.

below: Caspian Gull cachinnans C.V 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.

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