Larus cachinnans in the Netherlands

(last update: August 16, 2020)
Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse

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Project Info
Location Lelystad
Location De Kreupel
2019 Lelystad
2020 Lelystad
2021 Lelystad
Coded nests Lelystad
2020 De Kreupel
2021 De Kreupel
Coded nests De Kreupel
All ring codes 2020
All ring codes 2021

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

Lelystad 2021
nest y-PNED
nest y-PLDP
nest y-PHSV
nest y-P:A02
nest y-P:U60
nest zy-MT
nest r-FB
nest r-FC
nest 001
nest 003
nest 006
nest 011
nest 012
nest 013
nest 014
nest 015
nest 016B
nest 017
nest 018
nest 019
nest 021
nest 034
nest 035
nest 038
nest 040
nest 041
nest 042
nest 044
nest 045
nest 046
nest 047
nest 048
nest 053
nest 055
nest 056
nest 058
nest 060
nest 062
nest 063
nest 065
nest 066
nest 067
nest 072

Caspian Gull cachinnans F.N 1CY, June 26 2021, Lelystad, the Netherlands. Picture: Jeroen Nagtegaal & Mars Muusse.

Red tibia ring r[F.N], ringed as pullus Larus cachinnans on June 26 2021 at nest 14 in colony Lelystad, the Netherlands.
ID certain in 2020 & in 2021, both parents are the same as previous year, Caspian Gull cachinnans.

Visits and data nest 14.

date:        
  egg no: width (mm) length (mm) volume (cm3):  water test on April 27th:  
16-04-2021 A egg 52,2 73,9 101,39 40 - tip on bottom 3 eggs.
B egg 51,2 73,7 97,28 40 - tip on bottom  
C egg 50,2 68,7 87,17 30 - tip on bottom  
         
         
26-04-2021 Partner 1 at blocks in front of nest. Seemingly same parents as last year.
         
15-05-2021 3 eggs. (in retrospect: we should have checked for presence of letters on the eggs. Was this the still the same brood as on April 26th?)
         
28-05-2021 2 eggs + 1 chick (1 day old). What has been the breeding period for these eggs??? Was there a rapid 2nd attempt in late April???
  Female at nest, but P10 slightly ackward for pure cachinnans? (probably wrong bird?)
   
08-06-2021 Male is cachinnans.
  Female appears at blocks with one chick.
         
  metal tibia mass head + bill wing  
26-06-2021 .5550684 r-F.L 859 111,7 264 cachinnans
  .5550685 r-F.M 948 112,8 252 cachinnans
  .5550686 r-F.N 912 112,2 228 cachinnans