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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Nests at 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

Cachinnans - nest Lelystad 139

General remarks:

  • Eggs: Volume measured by Stonehouse (1964) and Spaans & Spaans (1975), which make comparison possible with data from Texel (Camphuysen pers comm 16.04.2020).
  • Nest 139 positioned on dam 1 eastern part, 65 mtr west of the lighthouse. Most eastern nest on dam 1. Nest on top of dam.
  • ID certain in 2022: parents are both adult Caspian Gulls.
location April 27th, 2022: nest location. April 27th, 2022: nest location. April 27th, 2022: 3 eggs.
 
partner 1 May 4th, 2022: partner 1 is cachinnans. April 27th, 2022: partner 1 is cachinnans. April 27th, 2022: partner 1 is cachinnans.
 
partner 1 May 4th, 2022: partner 1 is cachinnans. May 4th, 2022: partner 1 is cachinnans. May 4th, 2022: partner 1 is cachinnans.
 
partner 2 April 29th, 2022: partner 2 is Herring Gull type argenteus. April 29th, 2022: partner 2 is Herring Gull type argenteus. April 29th, 2022: partner 2 is Herring Gull type argenteus.
 
partner 2 April 29th, 2022: partner 2 is Herring Gull type argenteus.    
     
pullus May 22nd, 2022: pullus r[6.K]. June 22nd, 2022: pullus r[6.L]. May 22nd, 2022: pullus r[6.M].
 

Visits and data 2022 for nest 136:
Estimation egg laying: A-egg = April 12 2022. Estimating hatching = May 10 2022.

    egg no: width (mm): length (mm): water test April 27th:  
27-Apr-22 3 eggs A egg 73,5 50,5 tip bottom - 70 gr Flag 139 attached.
B egg 72,5 52,3 tip bottom - 40 gr
C egg 70 51 tip bottom - 40 gr
29-Apr-22 2 adults.  female has thin P5 band and standing bird is HG type.
male has cachinnans wing, but bulbuous bill
01-May-22 together with LBBGs
04-May-22 partner 1 present. Images
metal darvic mass wing H+B
22-May-22 pullus .5625162 r-6K 158 33 62,8
pullus .5625163 r-6L 160 35 63,4
pullus .5625164 r-6M 98 30 55,8
21-Jun-22 pullus r-6.L on blocks at nest 135. Both r-6L and r-6M fledged.
partner 2 is defending chick