Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
Cachinnans - nest Lelystad 263
General remarks:
- Eggs: Volume measured by Stonehouse (1964) and Spaans & Spaans (1975), which make comparison possible with data from Texel (Camphuysen pers comm 16.04.2020).
- Nest 263 positioned on breakwater dam 2, 12 mtr west of nest 14. Next to nest Blue Foam. Nest was in use in 2023 as well.
- In 2023: uncertain, both parents are Caspian Gull?
- In 2024: both parent are Caspian Gull, male with somewhat extensive black in wingtip.
| location | May 14th, 2024: pair. | April 21st, 2024: nest location. | April 21st, 2024: full clutch, with 3 eggs. |
 |
 |
 |
|
| partner 1 | April 23rd, 2024: female Caspian Gull. | April 23rd, 2024: female Caspian Gull. | April 30th, 2024: female Caspian Gull. |
 |
 |
 |
|
| partner 2 | April 23rd, 2024: male Caspian Gull. | April 23rd, 2024: male Caspian Gull. | April 23rd, 2024: male Caspian Gull. |
 |
 |
 |
|
| pullus | May 14 2024: pullus g-B|0. | May 14 2024: food is 3x Perch. | . |
 |
 |
Data for nest 263-2023:
| 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: |
| ? | 263-2023 | 77,3 | 49,1 | 93,83 | 78 | 48 | 90,48 | 61,1 | 47,8 | 70,29 | 254,61 |
| ring pulli: June 05 | laying A egg: May 04 | hatch A egg: June 01 | |||||||||
| 263-2023 | 263-2023 | ||
| dam: | dam 2 central - NEW NEST | ||
| location: | Under nest 262 (south side dam), 15 mtr W of 14. | ||
| breeders: | ? | ||
| OBSERVATIONS: | |||
| 11-05-2023 | eggs | 3 eggs measured, water test = 50, 80, 40 degrees | |
| 18-05-2023 | eggs | 3 eggs. Measured. | |
| 27-05-2023 | eggs | 3 eggs. | |
Visits and data 2024.
| NEST code | parent 1 | parent 2 | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST: | |
| 263-2024 | cach | cach | 66,7 | 48,8 | 79,98 | 68 | 50,3 | 86,63 | 67 | 50 | 84,34 | 250,94 | |
| # eggs | A-egg | hatch | # ringed chicks | # all chicks | # fledged chicks | comments | |||||||
| 3 | 15-4-2024 | 13-5-2024 | |||||||||||
| dam: | dam 2 central | ||||||||||||
| location: | next to nest Blue Foam | ||||||||||||
| parents? | Same as 2023? | ||||||||||||
| ring pulli: | 18-May | ||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale |
| 14-05-2024 | g-B|0 | .5631178 | nest 263 | PONT | 1CY | 106 | |||||||
| OBSERVATIONS: | |||||||||||||
| 21-04-2024 | eggs: | 3 eggs, measured. | |||||||||||
| adult: | 1x Caspian Gull. | ||||||||||||
| 30-04-2024 | adult: | female Caspian to nest, bird with mirror on P8 both wings. | |||||||||||
| 07-05-2024 | eggs: | 3 eggs here, and 2x eggs at location "Blue Foam". | |||||||||||
| 14-05-2024 | chicks: | 1x ringed | |||||||||||
| eggs: | 1x infertile | ||||||||||||
| food: | 3x Perch. | ||||||||||||
| 04-06-2024 | nest: | No chicks found in vegetation, but adult present. | |||||||||||