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 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

Caspian Gull cachinnans F|N 1CY, May 2021 - December 2022, the Netherlands, Belgium & Spain. Picture: Albert de Jong, Roland-Jan Buijs, David Fernandez & Juan Ruiz.

Tibia blue B-F|N and metal Arnhem NLA 5.559.386 ringed as pullus Larus cachinnans on May 28 2021 at nest 15 in colony Lelystad (Bataviahaven), Holland (5230.00 N 525.00 E), by ringer Roland-Jan Buijs.
ID certain, one parent is Caspian Gull cachinnans, the other Caspian Gull-type.

Recoveries after fledging:
21-08-2021 Blankenberge (Strand), West-Vlaanderen, BELGIE 5.119,00 N 307,00 E - Roland-Jan Buijs
04-12-2021 Pinto (Vuilstort), Madrid, SPANJE 4.015,00 N 342,00 W - J.M. Ruiz & D. Fernandez
11-12-2021 Pinto (Vuilstort), Madrid, SPANJE 4.015,00 N 342,00 W - D. Fernandez
08-01-2022 Pinto (Vuilstort), Madrid, SPANJE 4.015,00 N 342,00 W - J.M. Ruiz & D. Fernandez
27-02-2022 Colmenar Viejo (Vuilstort), Madrid, SPANJE 4.039,00 N 343,00 W colourring read Oscar Vilches
13-03-2022 Colmenar Viejo (Vuilstort), Madrid, SPANJE 4.039,00 N 343,00 W - David Fernández & Delfin Gonzalez
17-12-2022 Pinto (Vuilstort), Madrid, SPANJE 4.015,00 N 342,00 W colourring read David Fernández

Visits and data nest 15.

date:            
16-04-2021 egg no: width (mm) length (mm) volume (cm3):  water test on April 16th:  red flag 15 placed near nest.
  A egg 52,6 70,6 98,35 50 - tip bottom  
  B egg 51 72 94,29 40 - tip bottom  
  C egg 50,5 74,5 95,66 35 - tip bottom  
      sum nest: 288,30    
24-04-2021 2 eggs.     1 adult at blocks, guarding from look-out.
26-04-2021 Herring Gull tolerated on block in front of nest. Probably Herring Gull from nest 15B.
  Also, female on look-out and male leaves the nest for a short break or to check everything is okay.
13-05-2021 Female often on look-out block close to block 17, raising confusion if this is the partner of nest 17.
15-05-2021 1 egg cold, unfertile. Measurements Monika Ballmann: 73.2x50.4 (probably labeled C-egg in April)
  2 chicks present in nest: Mass = 232 gr & Mass = 193 gr.
  Food in nest: Roach (this is often a fishermen's by-catch from traps 200 meters from the nest).
28-05-2021   metal tibia mass head + bill 2 chicks ringed.
  pullus .5559385 b-F|M 707 86,3  
  pullus .5559386 b-F|N 730 93,7  
08-06-2021 Both pulli swimming 100 meters from waterfront, right between dams with large bulkships approaching. Protected by 1 parent, made their way back to dam 2.
26-06-2021 Nest abandoned.    

below: Caspian Gull cachinnans F|N 2CY, December 17 2022, Colmenar Viejo dump, Madrid, Spain. Picture: David Fernandez.

below: Caspian Gull cachinnans F|N 2CY, March 13 2022, Colmenar Viejo dump, Madrid, Spain. Picture: David Fernandez.

below: Caspian Gull cachinnans F|N 2CY, January 08 2022, Pinto dump, Madrid, Spain. Picture: David Fernandez.

below: Caspian Gull cachinnans F|N 1CY, December 11 2021, Pinto dump, Madrid, Spain. Picture: Juan Ruiz.

below: Caspian Gull cachinnans F|N 1CY, August 20 2021, Blanckenberge beach, Belgium. Picture: Roland-Jan Buijs.

below: Caspian Gull cachinnans F|N 1CY, May 28 2021, Lelystad, the Netherlands. Picture: Albert de Jong.