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

Argenteus - nest Lelystad r-7R & b/w-AG (118Z)

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 118 positioned on dam 1 south section. Control group Herring Gull nest to compare parameters.
  • ID certain in 2022: both adult Herring Gull argenteus.
  • ID in 2024: both parents are Herring Gull: r-7R & b/w-AG.
location April 27th, 2022: location of nest. April 27th, 2022: 3 eggs. May 1st, 2022: adult at nest.
 
partner 1: May 4th, 2022: adult at nest. May 5th, 2024: adult trapped at nest, now b/w-AG. .
   
food June 21st, 2022 food bolus. June 21st, 2022 food bolus. .
   
pullus May 30th, 2022 pullus r[6.9]: fledged. May 30th, 2022 pullus r[6.+]. June 21st, 2022 pullus NLA 5.625.148: fledged.
 

Data for nest 118Z-2022:
Estimation egg laying: A-egg = April 22 2022. Estimating hatching = May 20 2022.

27-Apr-22 3 eggs A egg 68 47,9 tip bottom - 0 gr
B egg 71 49,8 tip bottom - 20 gr
C egg 69 51,1 tip bottom - 20 gr
01-May-22 adult breeding
04-May-22 3 eggs 2 adults are Herring Gull.
09-May-22 3 eggs
17-May-22 3 eggs
metal darvic mass wing age
22-May-22 pullus 5625148 - 116 33 3 days
pullus 5625149 - 64 27 2 days
metal darvic mass wing H+B Bill
30-May-22 pullus 5625149 r-69 287 45 68,8 24,5
pullus 5625180 r-6+ 230 42 65,7 22,4
17-Jun-22 adult present
    ring mass H+B Bill Tarsus Wing
21-Jun-22 pullus 5625148 869 117,3 41,7 70 270
pullus r-6.+ 635 98 38,9 68,6 207
             
12-Jul-22 picture of r-69.

Visits and data 2024.

NEST code parent 1 parent  2 A_length A_width A_volume B_length B_width B_volume C_length C_width C_volume TOTAL NEST:
b/w-AG (118) teus teus 67,2 47,6 76,66 67,2 50,4 85,95  
2024 # eggs A-egg hatch # ringed chicks # all chicks # fledged chicks comments
  2 May 01 May 29
   
dam: dam 1 south
location: dam 1 western section, nest 118-2022, 40 mtr south of n-F|N.
parents? same as 2023?
   
ring pulli: June 03
date darvic metal location / nest# species sexe age wing mass head+ bill bill tarsus gonys greyscale
05-05-2024 b/w-AG .5631223 dam 1, nest 118 ZM M >4CY 445 1163 125,6 50,3 69,3 20,8 6
                           
OBSERVATIONS:
02-05-2024 adult: r-7R at site. Is 40 mtr SW of n-F|N.
05-05-2024 eggs 2x, measured.
  adult: Herring Gull male trapped at nest. Now b/w-AG.