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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Caspian Gull cachinnans 1:1 1CY, 2026, colony Lelystad, the Netherlands.

You can participate in this project too! Please send in your observations of colour ringed birds to: ring@buijsecoconsult.nl

Tibia Y-1:1 and metal 5.646.779, ringed as pullus Larus cachinnans on May 23 2026 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs ringing team.

Recoveries:
15-06-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
23-06-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E captured by ringer T. Horst & M. Muusse
26-06-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E captured by ringer T. Horst & M. Muusse
11-07-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
16-07-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst

Visits and data nest r-74 & y-0:4 (2026).

2026 parent 1 parent 2 A_length A_width A_volume B_length B_width B_volume C_length C_width C_volume
TOTAL NEST:
 # eggs
r-74 & y-0:4 cach hybrid 75,6 48,7 74,3 50,4 73,5 49,0  
 
ringed:
date darvic metal location / nest# species sexe age wing tarsus head+ bill bill gonys mass barcode
27-04-2026 y-0:4 .5641189 nest r-74 HYBRID F 5CY 424 67,8 119,7 53,1 19,3 770 26B02658
23-05-2026 y-1:1 .5646779 nest r-74 HYBRID - PULL    
23-05-2026 y-1:2 .5646780 nest r-74 HYBRID - PULL    
23-06-2026 y-1:1 .5646779 nest r-74 HYBRID - PULL 290 - 115,3 976 CONTROL
26-06-2026 y-1:1 .5646779 nest r-74 HYBRID - PULL 308 - 118,1 1043 CONTROL
               
OBSERVATIONS:
22-04-2026 nest 2 eggs, measured.
26-04-2026 nest 3 eggs, measured.
27-04-2026 nest 3 eggs.
  parents

Trapped female, now y-0:4.
27-06-2026 juv y-1:1 only fletched juvenile.