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

Home

Project Info
International trend
National trend
Site characteristics
Breeding biology
Fecundity
Food resources
Nonbreeding season
Breeding species
Hybrid scores
Ring codes
Future

Nests at Lelystad 2022
nest y-PNED
nest y-PHSV / r-CG
nest y-P:U60
nest y-X56A
nest y-X71A
nest y-X540
nest y-XCHP
nest w-327:U
nest n-F|N
nest r-6A
nest r-6B
nest r-6C
nest r-CS
nest r-FC
nest w-8Z
nest zy-MT
nest 003
nest 011
nest 012
nest 014
nest 015
nest 017
nest 017B
nest 018
nest 019
nest 021
nest 026
nest 034
nest 035
nest 038
nest 040
nest 044
nest 046
nest 048
nest 053
nest 055
nest 058
nest 060
nest 061Z
nest 062
nest 063
nest 107Z
nest 109
nest 111
nest 112
nest 113
nest 117Z
nest 118Z
nest 123Z
nest 124Z
nest 125Z
nest 126Z
nest 127Z
nest 128Z
nest 129Z
nest 131Z
nest 132 YLG
nest 133
nest 134
nest 135
nest 136
nest 137
nest 138
nest 139
nest 143Z
nest 203
nest 204
nest 207
nest 222Z
nest 227
nest 228Z
nest 229
nest 230Z
nest 231
nest 240Z
nest 244
nest 245Z

Caspian Gull cachinnans X56A 5CY-7CY, April 2022 - June 2024, the Netherlands. Picture: Eric Roeland, Thijs Horst & Mars Muusse.

DEH EA-202456 and y-X56A, ringed as pullus Caspian Gull (Larus cachinnans) on June 03 2018 in a mixed Caspian Gull colony at Gräbendorfer See - Lausitz, Brandenburg, Germany (51°42'00"N 14°06'00"E).

In 2022 breeding bird at colony Lelystad, the Netherlands with male cachinnans in nest 206 (y-X56A). Visits and data for this nest:
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.
 
egg sizes & volume 2023
SPECIES NEST A_length A_width A_volume B_length B_width B_volume C_length C_width C_volume TOTAL NEST: known parents?
cach x cach 229-2023 74 50 93,15 72,7 50,5 93,35 70,2 51,5 93,75 280,24 X56A &cach
ring pulli: 15-mei laying A egg: 10-apr hatch A egg: 8-mei
     
catch: date: metal: darvic: mass: wing: head+bill:      
pullus 11-5-2023 5.556.455 r-7Y -- -- --
pullus 11-5-2023 5.556.456 r-78 -- -- --
pullus 18-5-2023 5.556.410 g-7|U 166 -- 63
pullus 18-5-2023 5.556.455 r-7Y 221 -- 65
pullus 27-5-2023 5.556.410 g-7|U 362 -- --
pullus 27-5-2023 5.556.455 r-7Y 499 -- --
pullus 25-6-2023 5.556.456 r-78 1028 355 128,1
   
229-2023 y[X56A] is breeding in 229 (X56A was at nest 206 in 2022)
dam: dam 2 west
location: 25 mtr east of lighthouse, old Spoonbill nest, between bushes = nest 229-2022 of sub-adults.
breeders: cach x cach
OBSERVATIONS:
09-04-2023 y-X56A present north of dam. (27/4: yX56A not breeding at this nest in 2023).
26-04-2023 eggs: 3 eggs. Measured and water test: A/B/C:all are 90 - tip bottom.
nest: code 229 sprayed on entrance block.
27-04-2023 adult: parent 1 = yX56A
11-05-2023 pulli: 2 chicks ringed, 3rd egg hatching.
13-05-2023 adult: partner 2 is cach.
18-05-2023 pulli: 2 chicks present (R-7Y and unringed one, which is now ringed).
27-05-2023 pulli: 2x ringed birds measured: g-7|U & r-7Y.
18-06-2023 adult: ad yX56A easy at bread.
25-06-2023 pulli: r-78 and g-7|U present.

below: Caspian Gull cachinnans X56A 7CY, June 04 2024, colony Lelystad, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans X56A 7CY, March 25 2024, Lelystad, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans X56A 7CY, March 20 2024, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans X56A 7CY, March 08 2024, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans X56A 7CY, February 27 2024, Almere - De Vaart, the Netherlands. Picture: Mars Muusse.

below: Caspian Gull cachinnans X56A 6CY, December 06 2023, Almere - De Vaart, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans X56A 6CY, July 08 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans X56A 6CY, April 27 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans X56A 6CY, April 09 2023, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans X56A 6CY, February 19 2023, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans X56A 5CY, June 28 2022, Lelystad, the Netherlands. Picture: Mars Muusse.

below: Caspian Gull cachinnans X56A 5CY, June 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.

Always easy on bread.

Defending chick r[5.5].

below: Caspian Gull cachinnans X56A 5CY, June 02 2022, Lelystad, the Netherlands. Picture: Mars Muusse.

below: Caspian Gull cachinnans X56A 5CY, April 29 2022, Lelystad, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans X56A 5CY, April 19 2022, Lelystad, the Netherlands. Picture: Mars Muusse.

Nest nest 206 (aka y-X56A), in cluster with nests 12, 203, 204, 207, 227, 229; all pure Caspian Gull nests.

below: Caspian Gull cachinnans X56A 5CY, April 11 2022, Lelystad, the Netherlands. Picture: Mars Muusse.