Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans 0.02 adult, May 2023 - March 2024, the Netherlands. Picture: Leon Kelder, Anne Laansma, Thijs Horst & Mars Muusse.
Tarsus ring y-0.02 and logger 6392, ringed as breeding 5CY female Larus cachinnans on April 22 2023 at De Kreupel - nest M13, Holland (5247.00 N 513.00 E).
Ringer Kees Camphuysen & Leon Kelder.
See UvA-BITS for logger details.
Recoveries:
| 2023 | 04 | 22 | De Kreupel eiland M | NL | 52,8 | 5,2 | C.J. | Camphuysen | Nest M13 11:47-12:25, HPAIV swab, blood, biometrics, moult, ringed, GPS 6392 attached |
| 2023 | 04 | 22 | De Kreupel eiland J | NL | 52,8 | 5,2 | GPS | Receiver station colony | Preening at roost island after release |
| 2023 | 04 | 22 | De Kreupel eiland M | NL | 52,8 | 5,2 | GPS | Receiver station colony | Quickly returned to nest site |
| 2023 | 05 | 21 | De Kreupel eiland M | NL | 52,8 | 5,2 | Camera | Trap observation | Nest M13, Man Geel 002 (zendervogel!), vrouw Rood K.A en drie jongen (Groen 0/M, 0/N, 0/P) |
| 2023 | 10 | 24 | visfuik IJsselmeer Grootslag Andijk | NL | 52,8 | 5,2 | Anne (AJ) | Laansma | foeragerend bij de vissers die fuiken leegden ten noorden van vakantiepark Grootslag |
| 2023 | 10 | 31 | off De Ven, Enkhuizen, visfuik | NL | 52,7 | 5,3 | Anne (AJ) | Laansma | foeragerend bij de vissers die fuiken leegden, partner rK.A nearby |
| 2024 | 03 | 04 | De Kreupel | NL | 52,8 | 5,2 | Thijs | Horst | Gelokt met brood, geen plaats |
In 2023:
Nest is M13, partner is male adult Larus cachinnans r-K.A.
Red tibia R-KA was ringed as breeding adult male Larus cachinnans on April 23 2021 at IJsselmeer (De Kreupel), Holland (NL 5247.00 N 513.00 E). Ringer Roland-Jan Buijs & Leon Kelder.
Offspring are: g-0|M, g-0|N & g-0|P.
G-0|M was recorded at 30 km distance in winter (January 2024).
G-0|N hasd not been recorded after the breeding season.
G-0|P was found dead at 30 km from the colony, just a few months old in August 2023.
below: Caspian Gull cachinnans 0.02 adult, March 20-22 2024, from GPS data.
Terrestrial flights.
below: Caspian Gull cachinnans 0.02 adult, March 04 2024, colony De Kreupel, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 0.02 adult, February 26-28 2024, from GPS data.
Not so much aquatic feeding trips, as well more terrestrial flights.
below: Caspian Gull cachinnans 0.02 adult, October 01-31 2023, from GPS data.
As the IJseelmeer fishing season remains 'open', fouraging trips on IJsselmeer, feeding primarily on by-catches of fishermen.
Secondary food resource at IJsselmeer: kleptoparasitism (feeding by deliberately taking food from another) on Cormorants.
Bird frequents resting locations as sandy islands of Steile Bank, breakwater near Creil, and energy plant Lelystad.
below: Caspian Gull cachinnans 0.02 adult, October 31 2023, Enkhuizen. Picture: Anne Laansma.
Feeding on by-catch of fishermen.
Partners y-0.02 and r-K.A together at poles, when fishermen of vessel EH49 empty the nets.
below: Caspian Gull cachinnans 0.02 adult, October 24 2023, Grootslag Andijk. Picture: Anne Laansma.
Feeding on by-catch of fishermen.
below: Caspian Gull cachinnans 0.02 adult, April 22 - June 22 2023, from GPS data.
Feeding trips during incubation and chick raising period.
Few terrestrial trips
early
in the season, but main focus is already on aquatic trips; which intensifies later on.
below: Caspian Gull cachinnans 0.02 adult, May 21-23 2023, colony De Kreupel - nest M13, the Netherlands. Picture: Leon Kelder - camera trap.
In 2023:
Nest is M13, partner is male adult Larus cachinnans r-K.A.
Red tibia R-KA was ringed as breeding adult male Larus cachinnans on April 23 2021 at IJsselmeer (De Kreupel), Holland (NL 5247.00 N 513.00 E). Ringer Roland-Jan Buijs & Leon Kelder.
Offspring are: g-0|M, g-0|N & g-0|P.
G-0|M was recorded at 30 km distance in winter (January 2024).
G-0|N hasd not been recorded after the breeding season.
G-0|P was found dead at 30 km from the colony, just a few months old in August 2023.
