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 5.T 1CY-3CY, May 2022 - January 2024, the Netherlands & Engalnd. Picture: Ian Lewington, Caroline Walta, Thijs Horst & Mars Muusse.

Red tibia ring r[5.T] and metal NLA 5.625.114, ringed as pullus Larus cachinnans at nest y-P:U60 on May 17 2022 in colony Lelystad, the Netherlands. Ringer: Herman Bouman.
ID certain in 2022: both parents are Caspian Gull cachinnans.

Red tibia R-5T and metal NLA Arnhem 5.625.114, ringed as pullus Larus cachinnans on 17-05-2022 at Lelystad - Bataviahaven, Holland (5230.00 N 525.00 E), ringer Albert de Jong.

Recoveries:
28-03-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Suse Kühn
05-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Bob Loos & Caroline Walta
08-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Bob Loos
09-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Bob Loos
10-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Job ten Horn
17-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Bob Loos
18-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Kees de Leeuw
19-04-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Rob Dekker
03-05-2023 Callantsoog (Strand), Noord-Holland, NL 5.250,00 N 441,00 E colourring read Fred Cottaar
25-01-2024 Appleford (Vuilstort), Oxfordshire, ENGELAND 5.137,00 N 114,00 W colourring read Ian Lewington
30-01-2024 Appleford (Vuilstort), Oxfordshire, ENGELAND 5.137,00 N 114,00 W colourring read Ian Lewington

Data for this nest 2022:

date: egg no: width (mm) length (mm) volume (cm3):  water test on May 7th:  
12-04-2022 y-P:U60 present. Nest not excatly located yet, but close to place of previous season.
             
  egg no: width (mm) length (mm) volume (cm3):  water test on May 7th:  
15-04-2022 A 51,8 72,9 -- 40 - tip at bottom. 3 eggs in the nest.
  B 51,3 71,6 -- 30 - tip at bottom. Extrapolation: 1st egg laid on April 9th; 1st egg will hatch on May 7th. Ring: May 14th.
  C 50,1 70,5 -- 20 - tip at bottom.  
      sum nest: --    
   
27-04-2022 A       4 mm- floating. 3 eggs in the nest.
  B       3 mm- floating.  
  C       2 mm- floating.  
             
09-05-2022 y-P:U60 present.
   
  metal darvic mass  
17-05-2022 .5625114 r-5T 293 Much fish around nest, incl Roach / Rudd and rounded Goby.
  .5625115 r-5S 191      
  .5625116 r-5R 329      
         
  metal darvic mass  
30-05-2022 .5625116 r-5R 680 y-P:U60 and partner are present, together with (at least) .
   
02-06-2022 2 adults and 3 large chicks present.
   
17-06-2022 2 adults and (at least) 2 chicks present.
   
21-06-2022 2 adults and all 3 large chicks present.
   
28-06-2022 2 adults and all 3 large chicks present.
   
12-07-2022 2 adults and all 3 large chicks present.

below: Caspian Gull cachinnans 5.T 3CY, Juanuary 30 2024, Appleford England. Picture: Ian Lewington.

below: Caspian Gull cachinnans 5.T 3CY, Juanuary 25 2024, Appleford England. Picture: Ian Lewington.

below: Caspian Gull cachinnans 5.T 2CY, April 05 2023, paal 15 - Texel beach, the Netherlands. Picture: Caroline Walta.

below: Caspian Gull cachinnans 5.T 1CY, July 12 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 5.T 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

r[5.T] cachinnans from nest y[P:U60]. Picture: June 28th, 2022.
Fledged. Sibling r[5.R] & r[5.S] also fledged.

below: Caspian Gull cachinnans 5.T 1CY, June 21 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

With r-5.S in background.

below: Caspian Gull cachinnans 5.T 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.