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 6.K 1CY, May 22 2022, Lelystad, the Netherlands. Picture: Mars Muusse.

Red tibia ring r[6.K] and metal NLA 5.625.162, ringed as pullus Larus cachinnans at nest 139 on May 22 2022 in colony Lelystad, the Netherlands. Ringer: Jeroen Nagtegaal.
ID uncertain in 2022: one parent is adult cachinnans-type, other parent is adult argentatus-type.

27-Apr-22 3 eggs A egg 73,5 50,5 tip bottom - 70 gr Flag 139 attached.
B egg 72,5 52,3 tip bottom - 40 gr
C egg 70 51 tip bottom - 40 gr
29-Apr-22 2 adults.  female has thin P5 band and standing bird is HG type.
male has cachinnans wing, but bulbuous bill
01-May-22 together with LBBGs
04-May-22 partner 1 present. Images
metal darvic mass wing H+B
22-May-22 pullus .5625162 r-6K 158 33 62,8
pullus .5625163 r-6L 160 35 63,4
pullus .5625164 r-6M 98 30 55,8
21-Jun-22 pullus r-6.L on blocks at nest 135.
partner 2 is defending chick

Caspian Gull cachinnans 6.K 1CY, May 22 2022, Lelystad, the Netherlands. Picture: Mars Muusse.

r[6.K] cachinnans from nest 139. Picture: June 28th, 2022.
r[6.K] ringed on May 22nd. No observations since. Sibling r[6.L] and r[6.M] fledged.