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.A 1CY, May 09 2022, Lelystad, the Netherlands. Picture: Mars Muusse.

Red tibia ring r[C.A] and metal NLA 5.625.051, ringed as pullus Larus cachinnans at nest 60 on May 09 2022 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs.
ID certain, parents are male and female Caspian Gull; in season 2022 same parents as in season 2021.

Visits and data 2022:
Estimation egg laying: A-egg = April 6 2022??? Estimating hatching = May 4 2022.

date:              
11-04-2022 3 eggs.        
               
12-04-2022 Picture of adult male Caspian.        
               
  egg no: width (mm): length (mm): volume (cm3):  water test    
15-04-2022 A-egg 51,2 70,1 -- 40 - tip on bottom    
  B-egg 48,9 68,5   30 - tip on bottom  
  C-egg 51,1 70 -- 50 - tip on bottom
sum nest: --
   
19-04-2022 Adult breeding & 1 adult guarding.        
   
  egg no: width (mm): length (mm): volume (cm3):  water test    
27-04-2022 A-egg       5 mm - floating    
  B-egg       5 mm - floating  
  C-egg       5 mm - floating
   
01-05-2022 2 adult Caspians, male has spot on P5.
   
04-05-2022 3 eggs - little cracks in shell. hatching date will be 6th May.
       
09-05-2022   metal darvic mass wing H+B
pullus NLA 5.625.051 r-C.A 117    
pullus NLA 5.625.052 r-C.B 91    
pullus NLA 5.625.053 r-C.C 137      
       
17-05-2022   metal darvic mass wing H+B
pullus NLA 5.625.051 r-C.A 483    
pullus NLA 5.625.052 r-C.B 388    
pullus NLA 5.625.053 r-C.C 530      
food loads of fish near the nest.
               
02-06-2022 r-CB & r-CC swimming northside of dam, 80 meters from nest. Large chicks, protected by female. r-CB gives up food pellet: fish.
       
17-06-2022 One large chick from nest 60 flies out over Markermeer. And back again.
       
22-06-2022 r-CB & r-CC swimming northside of dam, 200 meters from nest. Large chicks, protected by parent.
         
12-07-2022 Picture of r-CC.

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

r[C.A] cachinnans from nest 60. Picture: May 9th, 2022.
Measured again on May 17th, but not recorded since.