Larus cachinnans in the Netherlands

(last update: August 16, 2020)

Coordinator:
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Leon Kelder
Mars Muusse

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Caspian Gull cachinnans F|= 1CY-3CY, May 2020 - April 2022, Lelystad & Almere, the Netherlands. Picture: Merijn Loeve, Rene Oosterhuis, Mars Muusse & Eric Roeland.

Black bar tibia ring n[F|=] and metal NLA 5.552.922, ringed as pullus Larus cachinnans on May 21 2020 at nest 014 in colony Lelystad, the Netherlands (230.00 N 525.00 E), ringer: Roland-Jan Buijs.
ID certain, both parents are Caspian Gull cachinnans.

Recoveries:
02-06-2020 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Mars Muusse
26-07-2020 Almere (De Blocq van Kuffeler), Flevoland, NL 5.225,00 N 513,00 E colourring read Eric Roeland
27-07-2020 Almere (De Blocq van Kuffeler), Flevoland, NL 5.225,00 N 513,00 E colourring read Rene Oosterhuis
26-01-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
01-02-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
25-02-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
27-02-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
09-03-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
18-03-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
19-03-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
23-03-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
25-03-2021 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Eric Roeland
19-06-2021 Almere (Oostvaardersplassen), Flevoland, NL 5.226,00 N 517,00 E colourring read Eric Roeland
19-07-2021 Lelystad (Oostvaardersdijk), Flevoland, NL 5.228,00 N 519,00 E colourring read Eric Roeland
25-02-2022 Barneveld (Vuilstort), Gelderland, NL 5.209,00 N 537,00 E colourring read Albert de Jong & Merijn Loeve
11-04-2022 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Mars Muusse

datum: egg no: width (mm) length (mm) volume (cm3):  water test on April 27th:  
15-04-2020 A 50,5 76,9 98,74 35 - tip on bottom 3 eggs in nest.
15-04-2020 B 50,4 77,2 98,74 25 - tip on bottom  
15-04-2020 C 50,4 71,8 91,83 15 - tip on bottom  
  sum nest: 289,31
27-4-2020     Certainty about parents, cachinnans.
   
21-05-2020 pullus     Nest empty, with fish. 2 chicks ringed. n[F|=].
21-05-2020 pullus     Nest empty, with fish. 2 chicks ringed. n[F|+].
   
02-06-2020 pulli     n[F|=] together with large juvenile, so nest with 3 juveniles fledged?

below: Caspian Gull cachinnans F|= 3CY, April 11 2022, Lelystad colony, the Netherlands. Picture: Mars Muusse.

below: Caspian Gull cachinnans F|= 3CY, February 25 2022, Barneveld, the Netherlands. Picture: Merijn Loeve.

below: Caspian Gull cachinnans F|= 2CY, March 19 2021, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|= 2CY, March 18 2021, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|= 2CY, March 09 2021, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|= 2CY, February 01 2021, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|= 2CY, January 26 2021, Almere, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans F|= 1CY, July 27 2020, Lelystad, the Netherlands. Picture: Rene Oosterhuis.

Juvenile plumage.

below: Caspian Gull cachinnans F|= 1CY, July 26 2020, Lelystad, the Netherlands. Picture: Eric Roeland.

After fledging.

Caspian Gull cachinnans F|= 1CY, May 21 2020, Lelystad, the Netherlands. Picture: Merijn Loeve.