Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans 7|J 1CY, May - September 2023, the Netherlands. Picture: Leon Kelder, Casper Swiebel, Thijs Horst & Mars Muusse.
Tibia ring G-7|J and metal NLA 5.556.401, ringed as pullus Larus cachinnans on May 18 2023 in nest 139 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.
Recoveries:
09-08-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
22-09-2023 Almere (Oostvaardersplassen), Flevoland, NL 5.226,00 N 517,00 E colourring read Casper Swiebel
| egg sizes & volume 2023 | ||||||||||||
| SPECIES | NEST | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST: | known parents? |
| cach x cach | 139 | 74,2 | 51 | 97,17 | 74,2 | 49,7 | 92,28 | 72,7 | 50,7 | 94,09 | 283,55 | same as 2022 |
| ring pulli: May 12. | laying A egg: April 7. | hatch A egg: May 5. | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | bill: | gonys: | greytone: | |||
| Pullus | 18-5-2023 | 5556401 | G-7|J | 161 | -- | 66 | -- | |||||
| Pullus | 18-5-2023 | 5556402 | G-7|K | 116 | -- | 57,4 | -- | |||||
| 139-2023 | |||||
| dam: | dam 1 east | ||||
| location: | easternmost nest with yellow/black flag. On N side with red/white foam. | ||||
| breeders: | cach x cach | ||||
| OBSERVATIONS: | |||||
| 04-04-2023 | adult: | 1x cachinnans guarding and at nest | |||
| 09-04-2023 | nest: | no eggs, nest is ready. Y/B flag near nest. | |||
| adult: | 1x cachinnans guarding and at nest | ||||
| 26-04-2023 | adult: | breeding cachinnans | |||
| eggs: | 3x egg, measured | A | 80 - punt bodem | ||
| B | 60 - punt bodem | ||||
| C | 90 - punt bodem | ||||
| 13-05-2023 | adult: | male and female are cachinnans. | |||
| 18-05-2023 | pulli: | 2 chicks ringed, 3rd not found | |||
| 27-05-2023 | pulli: | dense vegetation, nothing found. | |||
| 25-06-2023 | pulli: | g-7|K and g-7|J present | |||
below: Caspian Gull cachinnans 7|J 1CY, September 22 2023, Almere, the Netherlands. Picture: Casper Swiebel.
below: Caspian Gull cachinnans 7|J 1CY, September 11 2023, Wervershoof, the Netherlands. Picture: Leon Kelder.
below: Caspian Gull cachinnans 7|J 1CY, August 09 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7|J 1CY, July 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7|J 1CY, July 15 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7|J 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7|J 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 7|J 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
