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 De Kreupel 2020
nest r-02P4 20
nest y-X804 20
nest D01 20
nest D02 20
nest D03 20
nest L01 20
nest L02 20
nest L03 20
nest M02 20

Nests at De Kreupel 2021
nest r-02P4 20
nest w-201U 21
nest g-XLHD 21
nest r-KA 21
nest r-KB 21
nest r-KC 21
nest r-KD 21
nest r-KE 21
nest r-KF 21
nest r-KH 21
nest r-KJ 21
nest r-KK 21
nest A01 21
nest C03 21
nest C04 21
nest C06 21
nest D01 21
nest D03 21
nest D05 21
nest D06 21
nest D07 21
nest D08 21
nest E01 21
nest H01 21
nest L01 21
nest L02 21
nest L05 21
nest L06 21
nest L07 21
nest M01 21
nest M04 21
nest M06 21
nest Q01 21

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

Red tibia ring r[6.R] and metal NLA 5.625.167, ringed as pullus Larus cachinnans at nest 38 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.

metal darvic mass wing H+B nest dam 2 east - in LBBG section, outside project.
22-May-22 pullus .5625166 r-6P 303 58 73,2  
pullus .5625167 r-6R 253 45 71,7 Herring? Or chicks from nest 38-2021? (in retrospect, no cachinnans observed on May 22nd)
17-Jun-22 pullus r-6P en r-6R are dead in the nest
Today, 2 alarming and landing cachinnans here! deze plek Superficially parents of nest 38-2021 (2021 location abandoned).
However: female has thinner band on P5 & male has more compact band on P5, compared to 2021.

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

r[6.R] cachinnans from nest 38. Picture: May 22nd, 2022.
Found dead in nest on June 17th. Same for sibling r[6.P].