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 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|P 1CY, October 23-30 2021, Almere, the Netherlands. Picture: Eric Roeland.

Blue bar tibia ring b[F|P] and metal NLA 5.559.402, ringed as pullus Larus cachinnans on May 28 2021 at nest 13 in colony Lelystad, the Netherlands.
ID uncertain, one parent is probably same bird as the parent of 2020, again Caspian Gull cachinnans type (or just within Caspian range in the hybrid zone). Possible partner may be sub-adult Herring Gull type, but remains uncertain.

Visits and data nest 13:

date:    
26-04-2021 Adult bird landed on this location. First indication of occupied nest.
   
egg no: width (mm) length (mm) volume (cm3):  water test on April 27th:
06-05-2021 A egg 76,1 50,0 95,79 4 mm - floating 3 eggs in nest.
B egg 76,9 48,2 89,95 4 mm - floating
C egg 73,8 48,7 88,13 1 mm - floating
   
15-05-2021 Nest missed in control.
     
28-05-2021 metal tibia mass head + bill possible parent: Herring Gull type sub-adult.
pullus .5559402 b-F|P 210 58,8
pullus .5559403 b-F|R 190 67,2
pullus .5559404 b-F|S 185 65,2
     
08-06-2021 No visit. Spoonbill breeding here.
     
26-06-2021 No visit.  

below: Caspian Gull cachinnans F|P 1CY, October 30 2021, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|P 1CY, October 23 2021, Almere, the Netherlands. Picture: Eric Roeland.