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

Home

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

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 168

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 168 positioned on section "dam 1 blocks", at end of blocks, east, between Rose bushes "nest Rozebottel", halfway to top, only visible from N-side. 168 sprayed on block.
  • ID certain in 2023: both parents are Caspian Gull cachinnans, one is adult, one is sub-adult (4CY).
  • ID certain in 2024: both parents are Caspian Gull cachinnans.
nest May 13th, 2023: 2 Caspian Gulls near nest. May 14th, 2024: 2 Caspian Gulls near nest. April 21st, 2024: 3 eggs clutch.
 
partner 1 May 13th, 2023: adult male cachinnans. May 13th, 2023: adult male cachinnans. May 13th, 2023: adult male cachinnans.
 
  April 21st, 2024: adult male cachinnans. April 21st, 2024: adult male cachinnans. .
   
partner 2 May 13th, 2023: sub-adult female cachinnans. May 13th, 2023: sub-adult female cachinnans. May 13th, 2023: sub-adult female cachinnans.
 
  April 21st, 2024: adult female cachinnans. April 21st, 2024: adult female cachinnans. .
   
pullus May 7th, 2024: chick g-A|X. May 7th, 2024: chick g-A|Y. June 4th, 2024: chick g-A|Z.
 

Visits and data:

egg sizes & volume 2023
SPECIES NEST A_length A_width A_volume B_length B_width B_volume C_length C_width C_volume TOTAL NEST: known parents?
cach x cach 168-2023 70,5 48,7 84,19 70 49,8 87,41 69 48,6 82,06 253,65
ring pulli: laying A egg: hatch A egg
18-05-2023
   
168-2023 NEW NEST
dam: dam 1 blocks
location: at end of blocks, east, between Rose bushes, halfway N-side. 168 sprayed on block
breeders: cach x cach
OBSERVATIONS:
13-05-2023 nest: 3 eggs. Measured & water test: A 3 mm - floating
adult: 2 adults present. B 2 mm - floating
C 2 mm - floating
18-05-2023 nest: 1 chick (too small to ring), 1 hatching, 1 egg still complete
27-05-2023 nest: empty, no chicks found.
25-06-2023 pulli: 2 chicks, not ringed. Just outside the category "fledged", but "2 chicks fledged" will likely be the result for this nest in 2023.

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:
  cach cach 74 49 89,46 73,7 50,4 94,26 68,1 49 82,33 266,05
168-2024 # eggs A-egg hatch # ringed chicks # all chicks # fledged chicks comments
    08-4-2024 03-5-2024
   
dam: dam 1 blocks
location: Nest "rozenbottels": at east end of blocks, between Rose bushes, halfway N-side. 168 sprayed on block
parents? same as 2023?
   
ring pulli: 09-May
date darvic metal location / nest# species sexe age wing mass head+ bill bill tarsus gonys greyscale
07-05-2024 g-A|X .5631232 168 PONT 1CY 95          
07-05-2024 g-A|Y .5631233 168 PONT 1CY 80          
07-05-2024 g-A|Z .5631234 168 PONT 1CY 114          
04-06-2024 g-A|X .5631232 168 PONT 1CY 182 436 99,3        
04-06-2024 g-A|Z .5631234 168 PONT 1CY 218 598 105,5        
                           
OBSERVATIONS:
12-04-2024 eggs: 3 eggs, measured.
21-04-2024 eggs: 3 eggs, not measured.
adult: 2x Caspian Gulls at nest. Female: black P3-P10.
07-05-2024 chicks: 3x ringed.
14-05-2024 adult: 2x Caspian Gull.
04-06-2024 chicks: g-A|X & g-A|Z present, measured.
18-06-2024 chick: g-A|X present at water.