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 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

Caspian Gull cachinnans F|+ 1CY-5CY, May 2020 - March 2024, Lelystad & Almere, the Netherlands. Picture: Juriaan Rung, Merijn Loeve, Eric Roeland, Thijs Horst & Mars Muusse.

Tibia N-F|+ and metal Arnhem 5552921, ringed as pullus Larus cachinnans on May 21 2020 at Lelystad (Bataviahaven), Flevoland (5230.00 N 525.00 E), by ringer Roland-Jan Buijs.

Recovery:
26-09-2020 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Juriaan Rung
30-09-2020 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Eric Roeland
14-11-2020 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Eric Roeland
16-12-2020 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Eric Roeland
01-02-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
19-07-2021 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Eric Roeland
09-04-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
27-04-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
30-04-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
13-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
26-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
31-03-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
08-04-2024 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse

Black bar tibia ring n[F|+], ringed as pullus Larus cachinnans on May 21 2020 at nest 014 in colony Lelystad, the Netherlands.
ID certain, both parents are Caspian Gull cachinnans.

datum: egg no: width (mm) length (mm) volume (cm3):  water test on April 27th:  
15-04-2020 A 50,5 76,9 98,74 35 - tip on bottom 3 eggs in nest.
15-04-2020 B 50,4 77,2 98,74 25 - tip on bottom  
15-04-2020 C 50,4 71,8 91,83 15 - tip on bottom  
  sum nest: 289,31
27-4-2020     Certainty about parents, cachinnans.
   
21-05-2020 pullus     Nest empty, with fish. 2 chicks ringed. n[F|=].
21-05-2020 pullus     Nest empty, with fish. 2 chicks ringed. n[F|+].
   
02-06-2020 pulli     n[F|=] together with large juvenile, so nest with 3 juveniles fledged?

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:
n-F|+ 2024 cach cach 74,6 48,6 88,72 72,1 50 90,76 70,7 47 78,63 258,11
  # eggs A-egg hatch # ringed chicks # all chicks # fledged chicks comments
  3 16-4-2024 14-5-2024
   
dam: dam 1 south
location: dam 1 south, near cluster nest 60, but 5 mtr S, at Blackberry edge.
parents? n-F|+-2023 was at dam 2. Now new breeder at dam 1.
   
ring pulli: 18-May
date darvic metal location / nest# species sexe age wing mass head+ bill bill tarsus gonys greyscale
30-4-2024 n-F|+ .5552921 Dam 1 PONT M 5CY 464 1180 135 60,3 71 19,6 5
                           
                           
OBSERVATIONS:
12-4-2024 eggs: no nest found.
21-4-2024 eggs: 3 eggs, measured.
nest: cluster again: 60, 69, PAM0, n-F|+, and 2 Herrings to follow soon.
30-4-2024 adults: trapped n-F|+.

below: Caspian Gull cachinnans F|+ 5CY, March 31 2024, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

date darvic metal location / nest# species sexe age wing mass head+ bill bill tarsus gonys greyscale
30-4-2024 n-F|+ .5552921 Dam 1 PONT M 5CY 464 1180 135 60,3 71 19,6 5

below: Caspian Gull cachinnans F|+ 5CY, March 31 2024, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans F|+ 5CY, March 26 2024, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans F|+ 4CY, April 29 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Breeding in Lelystad colony this season.

below: Caspian Gull cachinnans F|+ 4CY, April 09 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Breeding in Lelystad colony in 2023.

below: Caspian Gull cachinnans F|+ 4CY, April 04 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans F|+ 2CY, July 19 2021, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|+ 2CY, February 01 2021, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|+ 1CY, September 30 2020, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|+ 1CY, September 26 2020, Almere, the Netherlands. Picture: Juriaan Rung.

below: Caspian Gull cachinnans F|+ 1CY, May 21 2020, Lelystad, the Netherlands. Picture: Merijn Loeve.