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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International trend
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Site characteristics
Breeding biology
Fecundity
Food resources
Nonbreeding season
Breeding species
Hybrid scores
Ring codes
Future

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

Lelystad 2023:
nest y-PNED
nest y-P:U60
nest y-X56A
nest y-X71A
nest y-X60J
nest y-XCHP
nest w-327:U
nest n-F|6
nest n-F|8
nest n-F|+
nest n-F|N
nest r-6.B
nest r-7.P
nest r-C.G
nest w-8Z
nest 003
nest 006
nest 013
nest 014
nest 015
nest 017
nest 017B
nest 018
nest 019
nest 021
nest 026
nest 033
nest 034
nest 035
nest 038
nest 040
nest 044
nest 046
nest 048
nest 053
nest 055
nest 060
nest 061Z
nest 062
nest 063
nest 107Z
nest 108
nest 109
nest 111
nest 112
nest 127Z
nest 131Z
nest 132 YLG
nest 135
nest 139
nest 147Z
nest 163
nest 167
nest 168
nest 204
nest 206
nest 207
nest 223
nest 227
nest 230Z
nest 231
nest 244Z
nest 245Z
nest 248
nest 251
nest 252
nest 253
nest 254
nest 255Z
nest 256Z
nest 262

Cachinnans - nest Lelystad 127Z

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 123Z positioned on dam 1 south, 2 meters north of 62, visible from north side. Part of "control group Herring Gulls".
  • ID uncertain in 2022: likely both adults are Herring Gull.
  • ID uncertain in 2023: one adult trapped at nest = Herring Gull. Location is same as 2022.
location April 27th, 2022: location of nest. April 27th, 2 eggs. May 4th, 2022: 3 eggs.
 
partner 1 June 6th, 2023: r[7.M] feeding at dump Almere. July 8th, 2023: adult now ringed, r[7.M]. .
   

Visits and data:
Estimation egg laying: A-egg = April 25 2022. Estimating hatching = May 23 2022.

date:              
19-04-2022 nest is empty        
               
  egg no: width (mm): length (mm): volume (cm3):  water test    
27-04-2022 A-egg 47,5 69,5   0 - tip on bottom    
  B-egg 47,2 69,1   0 - tip on bottom    
               
01-05-2022 adult Herring Gull breeding at nest  
               
  egg no: width (mm): length (mm): volume (cm3):  water test    
04-05-2022 A-egg 47,4 69,3 --      
  B-egg 47,1 69,2      
  C-egg 47 66,3 --  
sum nest: --
04-05-2022 adult Herring Gull breeding at nest  
   
09-05-2022 3 eggs
       
17-05-2022 3 eggs      
       
22-05-2022 3 eggs    
       
30-05-2022 2 eggs, and no chick found.
   
21-06-2022 2 eggs, rotten
   
nest 127-2023 same 2021-22
dam: dam 1 south
location: 2 mtr noord van (achter) nest 62, alleen zichtbaar vanaf noordzijde
breeders: teus x teus
OBSERVATIONS:
22-04-2023 eggs: 0x
03-05-2023 adult:  trapped adult at nest: r-7M.
eggs: 3x eggs
18-05-2023 eggs: 3x eggs
27-05-2023 pulli: 2x very small chicks, not ringed. 1x dead pullus in nest.
                   
catch: date: metal: darvic: mass: wing: head+bill: bill: gonys: greytone:
teus 03-05-2023 6214905 r-7M nn. 416 113 47,7 19,2 4 Herring Gull female

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:
r-7.M (2024) teus teus 71,3 49,7 88,68 71,2 48,7 85,02 69,3 49,2 84,46 258,16
  # eggs A-egg hatch # ringed chicks # all chicks # fledged chicks comments
  3 28-4-2024 26-5-2024
   
dam: dam 1 east
location: most eastern nest on dam 1. same as 2023, with white/red isolation foam
parents? same as 2023
   
ring pulli: 31-May
date darvic metal location / nest# species sexe age wing mass head+ bill bill tarsus gonys greyscale
02-05-2024 r-7M .6214905 cluster 60-62-63 ZM F >4CY 410 804 110,7 45 63,5 21,1 5
                           
OBSERVATIONS:
31-03-2024 adult: r-7M on bread.
26-04-2024 eggs 1 egg, not measured.
02-05-2024 nest: 3 eggs, not measured.
adults: trapped r-7M Herring Gull (2023 adult).
05-05-2024 nest: 3 eggs.
14-05-2024 nest: 3 eggs.