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

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Caspian Gull cachinnans B.2 2CY-3CY, April 2022 - April 2023, Asturias, Spain. Picture: José Antonio Cañizares & Menéndez Vega.

Red tibia ring r[B.2] and metal NLA 5.556.771, ringed as pullus Larus cachinnans on May 28 2021 at nest w-201:U in colony De Kreupel, the Netherlands (5247.00 N 513.00 E) - ringer Leon Kelder.
Brother/sister of the bird in the picture, which is b[D|0].
ID certain, parents known as mother Caspian Gull cachinnans w[201:U] and unringed father Caspian Gull cachinnans.

Recoveries:
01-04-2022 Bañugues (Strand), Asturias, Spain (4.338,00 N 538,00 W) - José Antonio Cañal
12-03-2023 Peñas, Asturias, SPANJE 4.339,00 N 550,00 W colourring read Daniel Velasco
21-03-2023 Gijón (Haven El Musel), Asturias, SPANJE 4.333,00 N 541,00 W colourring read Jose A. Tielve
22-03-2023 Gijón (Haven El Musel), Asturias, SPANJE 4.333,00 N 541,00 W colourring read Ignacio Menéndez Vega
26-03-2023 Gijón (Haven El Musel), Asturias, SPANJE 4.333,00 N 541,00 W colourring read Jose A. Tielve
14-04-2023 Gijón (Haven El Musel), Asturias, SPANJE 4.333,00 N 541,00 W colourring read Ignacio Menéndez Vega
04-08-2023 Medemblik (Gemaal Lely), Noord-Holland, NL 5.246,00 N 506,00 E colourring read Bert Winters

below: Caspian Gull cachinnans B.2 3CY, April 14 2023, Gijón - Asturias, Spain. Picture: Menéndez Vega.

below: Caspian Gull cachinnans B.2 3CY, March 22 2023, Gijón - Asturias, Spain. Picture: Ignacio Menéndez Vega.

below: Caspian Gull cachinnans B.2 3CY, March 12 2023, Peñas - Asturias, Spain. Picture: Daniel Velasco.

below: Caspian Gull cachinnans B.2 2CY, April 01 2022, Bañugues - Asturias, Spain. Picture: José Antonio Cañizares.

below: Caspian Gull cachinnans B.2 1CY, May 28 2021, De Kreupel - D, the Netherlands. Picture: Leon Kelder.

(no picture available for r-B.2, this b-D|0 is the sibling)

Date: details:            
           
23-4-2021 1 egg in nest. egg no: width (mm): length (mm): volume (cm3): 
Attempt to trap breeding adult. Failed. A egg 50.6 73.8
           
14-5-2021 2 eggs in nest.        
2 adults near nest. One ringed w[201:U].      
https://waarneming.nl/observation/214662645/            
           
20-5-2021 1 egg hatching & 1 chick. metal: tibia: mass (gr): head + bill: tarsus:  
Prey: 1x Roach. NLA 5.556.757 b-D|0 75 48.6 27.8  
https://waarneming.nl/observation/214707336/            
  Camera trap near nest: 1 pullus & 2 adults.            
  https://waarneming.nl/observation/223648760/            
   
28-5-2021 2 chicks in nest. metal: tibia: mass (gr): head + bill: tarsus:
  Unringed male Caspian & w[201:U] female Caspian. NLA 5.556.757 b-D|0 231 66.7 41.6  
    NLA 5.556.771 r-B.2 168 61.2 36.2