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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Breeding biology
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Breeding species
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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 0.04 adult, 2023-2024, the Netherlands & France. Picture: Tim Raats, Robin Dérozier, Thijs Horst & Mars Muusse.

Tarsus ring y-0.04 and logger 6396, ringed as breeding adult Larus cachinnans on April 22 2023 at De Kreupel - nest M14, the Netherlands (5247.00 N 513.00 E). Ringer Kees Camphuysen & Leon Kelder.
See UvA-BITS for logger details.

Recoveries:

Year Mm Dd Location   Lat Long Observer   NOTES
2023 04 22 De Kreupel eiland M NL 52,8 5,23 C.J. Camphuysen Nest M14 12:01-12:40, HPAIV swab, blood, biometrics, moult, ringed, GPS 6396 attached
2023 04 22 De Kreupel eiland J NL 52,8 5,22 GPS Receiver station Preening at roost island after release
2023 04 22 De Kreupel eiland M NL 52,8 5,23 GPS Receiver station Quickly returned to nest site
2023 11 22 Tilburg, vuilstort De Spinder NL 51,6 5,05 Tim Raats .
2024 01 14 Étang du Vignoble, Valenciennes, France F 50,35 3,5 Robin Dérozier .
2024 03 04 De Kreupel NL 52,8 5,23 Thijs Horst Gelokt met brood, geen plaats

In 2023:
Nest is M14, partner is adult Larus cachinnans r-K.B.
Red tibia R-KB was ringed as >4CY male Larus cachinnans on April 23 2021 at De Kreupel, by ringers Roland-Jan Buijs, Leon Kelder & Merijn Loeve.
Offspring in 2023 are: g-0|R, g-0|S & g-0|T.

below: Caspian Gull cachinnans 0.04 adult, March 30 - April 01 2024, from GPS data.

below: Caspian Gull cachinnans 0.04 adult, March 03 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 0.04 adult, February 24-26 2024, from GPS data.

below: Caspian Gull cachinnans 0.04 adult, November 18 2023 - January 18 2024, from GPS data.

Fishing season in IJsselmeer is closed (no more by-catches from fish-traps), which may have been a trigger for y-0.04 to move south.

below: Caspian Gull cachinnans 0.04 adult, January 14 2024, Étang du Vignoble, Valenciennes, France. Picture: Robin Dérozier.

below: Caspian Gull cachinnans 0.04 adult, November 22 2023, Tilburg - De Spinder, the Netherlands. Picture: Tim Raats.

below: Caspian Gull cachinnans 0.04 adult, August 01 - October 13 2023, from GPS data.

Foraging trips over IJsselmeer area, this period the fishing season (nets and fish-traps) is still open.
Likely, main food item is by-cactch from fishermen.

below: Caspian Gull cachinnans 0.04 adult, April 22 - June 30 2023, from GPS data.

Feeding trips during incubation and chick raising period.