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

Red tibia ring r[6.J] and metal NLA 5.625.161, ringed as pullus Larus cachinnans at nest 204 on May 22 2022 in colony Lelystad, the Netherlands. Ringer: Jeroen Nagtegaal.
ID uncertain in 2022: one parent is adult cachinnans, other parent not photographed.

Recoveries:
30-05-2022 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E captured by ringer Albert de Jong
21-07-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder

April 15 2022 3 eggs A egg 70,2 51,8 tip bottom - 50 gr nest 204 is 3 mtr O of nest 203.
B egg 70,8 51,5 tip bottom - 50 gr code 204 sprayed on block.
C egg 68,7 51,8 tip bottom - 40 gr
April 29 2022 3 eggs A egg drijft - 3 mm
B egg drijft - 3 mm
C egg drijft - 2 mm
May 01 2022 adult cach at nest. 2x cach of nest 203 close by.
May 04 2022 adult cach partner 1 at nest.  
May 17 2022 no chicks found near nest
metal darvic mass wing H+B
May 22 2022 pullus .5625160 r-6H 537 125 90,6
pullus .5625161 r-6J 582 108 91,7
May 30 2022 pullus r-6H swimming with sibbling at N-side dam 2
pullus r-6J also swimming
June 21 2022 pullus r-6J & r6H again swimming N-side dam 2
June 28 2022 pullus r-6J & r6H again swimming N-side dam 2

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

r[6.J] cachinnans from nest 204. Picture: June 28th, 2022.
Fledged. Sibling r[6.H] also fledged. No confirmation on 3rd egg.

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

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

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