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

Red tibia ring r[6.S] and metal NLA 5.625.168, ringed as pullus Larus cachinnans hybrid at nest 55 on May 30 2022 in colony Lelystad, the Netherlands. Ringer: Roland-Jan Buijs ringing team.
ID certain in 2022: both parents are adult cachinnans.

Red tibia R-6S and metal NLA Arnhem 5.625.168, ringed as pullus Larus cachinnans on 30-05-2022 at Lelystad - Bataviahaven, Holland (5230.00 N 525.00 E), ringer Albert de Jong.

Recoveries:
28-3-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Suse Kühn
10-4-2023 Westerslag (Strand), Texel, NL 5.302,00 N 442,00 E colourring read Job ten Horn

Data for this nest:

15-Apr-22 3 eggs A egg 72,3 50 punt bodem - 60 gr nest located at 55-2021.
B egg 70,8 50 punt bodem - 30 gr orange jerrycan added near nest.
C egg 66,4 48,5 punt bodem - 10 gr
29-Apr-22 3 eggs A egg float - 4 mm  
B egg float - 3 mm
C egg float - 4 mm
04-May-22 adult male & female cachinnans, female at nest. Large blocks are gurading points.
09-May-22 2 eggs 1 chick hatched this morning (B egg), 1 egg with small hole, 1 egg with cracks.
17-May-22 no chicks found
22-May-22 no chicks found
metal darvic mass wing H+B Bill
30-May-22 pullus .5625168 r-6.S 817 175 100,3 40,3
02-Jun-22 adult  both adults at the blocks near the nest.
17-Jun-22 adult 2 adulten present
pullus 2 pulli present, no sight at legs.
21-Jun-22 pullus 2 pulli present, r[6.S] and one unringed cachinnans chicks.
2 adulten present

below: Caspian Gull cachinnans 6.S 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

r[6.S] cachinnans from nest 55. Picture: June 28th, 2022.
Fledged. Unringed sibling also fledged. No confirmation on 3rd egg.

below: Caspian Gull cachinnans 6.S 1CY, June 21 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.

View from north side, with unringed sibling.

below: Caspian Gull cachinnans 6.S 1CY, May 30 2022, Lelystad, the Netherlands. Picture: Mars Muusse.