Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Albert de Jong
Merijn Loeve
Roland-Jan Buijs
Thijs Horst
Leon Kelder
Mars Muusse
Caspian Gull cachinnans 5.8 1CY-5CY, 2022-2026, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Red tibia ring r[5.8] and metal NLA 5.625.145, ringed as pullus Larus cachinnans at nest r-FC on May 17 2022 in colony Lelystad, the Netherlands. Ringer: Herman Bouman.
ID certain in 2022, both parents are Caspian Gull cachinnans. Father is r[F.C], trapped as breeding Caspian Gull in 2021 at nest 108, now breeder at nest 104, which is 200 mrts east and with a different partner.
Visits and data 2022 for nest r-FC:
Estimation egg laying: A-egg = April 14 2022. Estimating hatching = May 12 2022.
| date: | |||||||||
| r-F.C former breeder at T-split, now breeding in eastern part of dam 1, neighbour of y-PNED. | |||||||||
| 15-04-2022 | 1 egg in nest. Nest coded "104". | ||||||||
| egg no: | width (mm) | length (mm) | volume (cm3): | water test on April 15th: | |||||
| A egg | 72,6 | 50,8 | -- | 00 - flat on bottom | |||||
| 19-04-2022 | y-PNED close near nest "104", but apparently not the partner. | ||||||||
| 27-04-2022 | 2 egg in nest. Extra yellow-black flag placed. | ||||||||
| r-FC present at nest. | |||||||||
| egg no: | width (mm) | length (mm) | volume (cm3): | water test on April 27th: | |||||
| A egg | -- | 90 - tip on bottom | |||||||
| B egg | 72,2 | 49,2 | -- | 80 - tip on bottom | |||||
| 01-05-2022 | r-FC present at nest. | ||||||||
| 17-05-2022 | 2 chicks in nest. One throws up food: fish. | ||||||||
| Food: Rounded Gobt 5,19 gr. | |||||||||
| metal | darvic | mass | |||||||
| .5625144 | r-59 | 101 | |||||||
| .5625145 | r-58 | 142 | |||||||
| 28-06-2022 | r-5.8 photographed. | ||||||||
| 12-07-2022 | r-5.8 photographed. | ||||||||
below: Caspian Gull cachinnans 5.8 5CY, March 08 2026, colony Lelystad, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 5.8 1CY, July 12 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 5.8 1CY, June 28 2022, Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
r[5.8] cachinnans from nest 104 r[F.C]. Picture: June 28th, 2022.
Fledged. From this 2-egg nest, also sibling r[5.9] ringed on May 17th, but not recorded since.
below: Caspian Gull cachinnans 5.8 1CY, May 17 2022, Lelystad, the Netherlands. Picture: Mars Muusse.
