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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Project Info
Location Lelystad
Location De Kreupel
2019 Lelystad
2020 Lelystad
2021 Lelystad
Coded nests Lelystad
2020 De Kreupel
2021 De Kreupel
Coded nests De Kreupel
All ring codes 2020
All ring codes 2021

Lelystad 2020:
nest 001
nest 002 yPNED
nest 003
nest 005 yPLDP
nest 006 yPESV
nest 008 gXLDT
nest 009
nest 011
nest 012
nest 013
nest 014
nest 015
nest 016
nest 017
nest 018
nest 021
nest 025
nest 027
nest 028
nest 029
nest 031
nest 032
nest 033
nest 034
nest 035
nest 036
nest 037
nest 038
nest 039
pair A
pair B

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

Cachinnans - nest Lelystad 222

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 222 positioned high on breakwater dam 2 at the north side, 8 meters east of nest 17.
  • ID uncertain in 2022, female is argenteus, male is hybrid type (rich yellow legs, red orbital, bulbuous bill, pale iris, broad band P5, broad medial band on P10, darker grey deck).
  • In 2023: nest not used.
  • In 2024: uncertain.
location May 1st, 2022: nest (view from north). April 29th, 2022: 2 eggs. April 29th, 2022: 2 eggs.
 
location April 21st, 2024: 1 egg. April 23rd, 2024: both are Caspian Gull. .
   
partner 1 May 1st, 2022: female argenteus. May 4th, 2022: female argenteus. May 4th, 2022: female argenteus.
 
partner 1 April 23rd, 2024: female Caspian Gull. April 23rd, 2024: female Caspian Gull. April 23rd, 2024: female Caspian Gull.
 
partner 2 May 4th, 2022: male is hybrid "river gull". May 4th, 2022: male is hybrid "river gull". May 4th, 2022: male is hybrid "river gull".
 
partner 2 April 23rd, 2024: male Caspian Gull. April 23rd, 2024: male Caspian Gull. April 23rd, 2024: male Caspian Gull.
 
       

Visits and data 2022.

date            
29-04-2022 2 eggs egg no: width (mm) length (mm) volume (cm3):  water test on April 29th: 
    A 73,8 51,6 -- 15 - flat on bottom
    B 73,1 52,7 -- 10 - flat on bottom
01-05-2022 2 birds at nest, male 'river gull' hybrid type (rich yellow legs, red orbital, bulbuous bill, pale iris, broad band P5, broad medial band on P10). Female is Herring Gull.
04-05-2022 2 birds at nest. Female breeds.
09-05-2022 3 eggs.
             

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:
  69,5 50 87,48 0,00 0,00 87,48
222-2024 # eggs A-egg hatch # ringed chicks # all chicks # fledged chicks comments
    21-4-2024 19-5-2024
   
dam: dam 2 central
location: 222-2022, behind Elderberry, 3 mtr east of 17
parents? Same as 2022? was River Gull x Herring Gull in 2022. Nest not used in 2023.
   
ring pulli: 25-May
date darvic metal location / nest# species sexe age wing mass head+ bill bill tarsus gonys greyscale
                           
OBSERVATIONS:
21-04-2024 eggs: 1 egg, measured.
07-05-2024 nest: 3 eggs.
14-05-2024 nest: 3 eggs.
31-05-2024 nest: broken eggs around nest. Predation?
04-06-2024 nest: seems abandoned, failed season 2024.