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
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 PLDP (2020: 005, 2021: 052, 2022: not breeding)

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 005 positioned in dense Blackberry vegetation, in vicinity of Spoonbill nests, on artificial breakwater 1 at T-split.
  • Certainty on ID in 2020, breeders are Caspian Gull cachinnans, one partner is ringed yellow PLDP and one unringed partner. Neighbours of yellow PESV (nest 006).
  • In 2021: same 2 partners, again Caspian Gulls cachinnans. Bird has moved to nest location of y[PESV]-2020. PESV not present in 2021.
location Nest in vegetation: 2020. Nest: April 16th, 2021. April 01 2022 at Almere dump. Not breeding this year at Lelystad.
 
eggs Eggs April 15th, 2020: 2 eggs clutch. Eggs April 27th, 2020: 2 eggs clutch. Eggs April 16th, 2021: 3 eggs clutch.
 
partner 1 May 7th, 2020: cachinnans y[PLDP]. May 7th, 2020: cachinnans y[PLDP]. April 15th, 2020: cachinnans y[PLDP].
 
partner 2 May 7th, 2020: cachinnans unringed. May 7th, 2020. May 6th, 2021.
 
pulli June 2nd, 2020 pullus unringed. May 28th, 2021: pullus b[F|5] probably C-chick. .
   

Visits and data.

date: egg no: width (mm) length (mm) volume (cm3):     
15-04-2020 A 50,4 71,9 91,96   2 eggs in nest.
15-04-2020 B 50,8 73,05 94,92
      sum nest: --
27-04-2020 eggs         Controlled: still 2 eggs.
 
07-05-2020 pullus     Nest is empty. Small chick next to nest (7 days old).
   
21-05-2020 pulli   Empty nest, no pulli found, but lots of shit-traces.
     
02-06-2020 pulli   Parent y[PLDP] with 2 chicks close by.
       
date:      
30-03-2021 PLDP and partner both present at blocks near waterfront.
       
16-4-2021 egg no: width (mm) length (mm) volume (cm3):  water test on April 16th, 2021:  
  A egg 51,3 75,2 99,64 45 - tip bottom 3 eggs in nest. 2 partners at nest, one is y[PLDP].
  B egg 50,6 77,2 99,52 35 - tip bottom
  C egg 50,5 77 98,87 30 - tip bottom
    sum nest: --    
       
24-04-2021 partner 2 is unringed. Code of nest changed to 52.
       
26-04-2021 No visit, Camilla is trapping Spoonbills here.
       
06-05-2021 2 chicks of few days old. 1 egg is hatching.
       
13-05-2021 No visit, Camilla is trapping Spoonbills here.
       
15-05-2021       mass (gr) head + bill (mm)  
  pullus     142 --  
  pullus 221 65,5 measurements Monika Ballmann.
       
28-05-2021   metal tibia mass (gr) head + bill (mm)  
  pullus .5559418 b-F|5 -- 87 probably C-chick.
       
08-06-2021 PLDP attacks us. Partner also present. No chick visible.