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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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 6.2 1CY, May - July 2022, Lelystad, the Netherlands. Picture: Tom Whiley & Mars Muusse.

Red tibia ring r[6.2] and metal NLA 5.625.178, ringed as pullus Larus cachinnans at nest 135 on May 30 2022 in colony Lelystad, the Netherlands. Ringer: Albert de Jong / Roland-Jan Buijs ringing team.
ID certain in 2022: both parents are adult cachinnans, one is a diagnostic bird called "thayeri".

Recoveries:
02-08-2022 Cley (Marshes), Norfolk, ENGELAND 5.257,00 N 103,00 E colourring read Tom Whiley
18-01-2023 Sonzay (Vuilstort), Indre-et-Loire, FRANKRIJK 4.730,00 N 28,00 E colourring read Benjamin Griard
20-01-2023 Sonzay (Vuilstort), Indre-et-Loire, FRANKRIJK 4.730,00 N 28,00 E colourring read Benjamin Griard
200-4-2024 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
17-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder

date:              
15-04-2022 Nest ready. Still empty. With adult Caspian Gull.
   
19-04-2022 Adult female thayeri now here.
               
  egg no: width (mm): length (mm): volume (cm3):  water test    
27-04-2022 A egg 50,9 73,4 -- 90 - tip on bottom    
  B egg 50 75,9   float - 1 mm  
  C egg 51,9 74,5 -- 90 - tip on bottom
sum nest: --
   
04-05-2022 Adult breeding at nest.
   
30-05-2022 2 chicks at nest.
    metal darvic mass wing H+B Bill
pullus .5625178 r-6.2 472 115 85,8 33,6
pullus .5625179 r-6.3 411 70 83,6 29,5
02-06-2022 2 adults at nest and 2 chicks, no rings visible.
21-06-2022 Adult thayeri at nest. Easy on bread.
28-06-2022 Adult thayeri at nest. Easy on bread.
12-07-2022 Adult thayeri at nest. Moult: P2/P5. With r-62.
17-07-2022 Adult thayeri at nest.

below: Caspian Gull cachinnans 6.2 1CY, August 02 2022, Cley, UK. Picture: Tom Whiley.

below: Caspian Gull cachinnans 6.2 1CY, July 12 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 6.2 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.

r[6.2] cachinnans from nest 135. Picture: May 30th, 2022.
Ringed on May 30th. Same for sibling r[6.3]. Two chicks present at nest on June 2nd, which are likely these two chicks, but no view on legs. No confirmation on 3rd egg.