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 0:S 1CY, 2026, the Netherlands & U.K. Picture: Dave Mansell.

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

Tibia Y-0:S and metal 5.646.707, ringed as pullus Larus cachinnans on May 10 2026 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs ringing team.

Recoveries:
19-06-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
19-08-2026 Scarborough (Scalby Mills), North Yorkshire, ENGELAND 5.418,00 N 24,00 W colourring read Dave Mansell

Visits and data for nest g-A|G 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
g-A|G (038) cach cach 69,8 52,6 66,8 51,2 66,6 50,1 3
 
ringed:
date darvic metal location / nest# species sexe age wing mass head+ bill bill tarsus gonys barcode
13-04-2026 g-A|G CONTROLL g-A|G (038) PONT F >4CY       26B02642
10-05-2026 Y-0:S .5646707 g-A|G (038) PONT pullus 60    
10-05-2026 Y-0:T .5646708 g-A|G (038) PONT pullus 55    
19-05-2026 Y-1:L .5646742 g-A|G (038) PONT pullus 140  
               
OBSERVATIONS:
04-04-2026 nest

3 eggs, measured.
13-04-2026 parents Attempt to trap unringed partner, failed. Trapped g-A|G again.
26-04-2026 nest

3 eggs.

10-05-2026 pullus 2x pullus ringed. 1x wet chick, hatched today.
19-05-2026 pullus 1x pullus ringed. 3rd chick from this nest.
26-05-2026 pullus Found dead today, at T-split dam 2: y-0:T from nest g-A|G. Ring will be recycled. See Y-0:T
     

below: Caspian Gull cachinnans 0:S 1CY, August 19 2026, Scarborough - North Yorkshire, U.K. Picture: Dave Mansell.