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 5.4 1CY, May - June 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Red tibia ring r[5.4] and metal NLA 5.625.139, ringed as pullus Larus cachinnans at nest 206 / y[X56A] on May 17 2022 in colony Lelystad, the Netherlands. Ringer: Herman Bouman.
ID certain in 2022, both parents are Caspian Gull cachinnans, including y[X56A] from Germany.

Visits and data.

date:              
11-04-2022 yellow ring at this location, can it be y-X56A?  
     
12-04-2022 2 adults near nest.  
               
  egg no: width (mm): length (mm): volume (cm3):       
15-04-2022 A 52,2 74,5 -- 20 - tip bottom 3 eggs  
  B 52,7 74,2   10 - tip bottom  
sum nest: --
   
19-04-2022 2 adults near nest.  
   
  egg no:     3 eggs, 2 adults (incl y-X56A).    
29-04-2022 A float - 3 mm          
  B float - 2 mm        
C float - halfway    
   
09-05-2022 3 eggs. Hatching day for B egg. Small hole in egg.
   
  metal colour mass        
17-05-2022 .5625139 r-54 251        
  .5625140 r-55 181      
.5625141 r-53 225  
   
02-06-2022 adult y-X56A present on bread.
   
17-06-2022 r-55 flying around; parent y-X56A ferociously protect the chick.
   
21-06-2022 adult y-X56A present. Chicks r-53, r-54, r-55 swimming around.
  food: we catch r-55, throws up fish food.
   
28-06-2022 adult y-X56A present. Chicks r-53 & r-55 photographed.
   
12-07-2022 Chick r-55 photographed.

below: Caspian Gull cachinnans 5.4 1CY, June 21 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

r[5.4] cachinnans from nest 206 y[X56A]. Picture: June 21st, 2022.
Fledged. Sibling r[5.3] & r[5.5] also fledged.

below: Caspian Gull cachinnans 5.4 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.