Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans 8|U 1CY, May - July 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Tibia ring G-8|U and metal NLA 5.625.265, ringed as pullus Larus cachinnans on May 27 2023 in nest 019 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.
| 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 teus | 19-2023 | 74,6 | 53,1 | 105,91 | 0 | 0 | 0,00 | 0 | 0 | 0,00 | 105,91 | new birds |
| ring pulli: 27-05-2023 | laying A egg: 26-04-2023 | hatch A egg: 24-05-2023 | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
| Pullus | 27-05-2023 | 5.625.263 | g-8|T | 160 | -- | -- | ||||||
| Pullus | 27-05-2023 | 5.625.265 | g-8|U | 80 | -- | -- | ||||||
| Pullus | 27-05-2023 | 5.625.267 | g-8|S | 125 | -- | -- | ||||||
| Pullus | 18-06-2023 | 5.625.265 | g-8|U | -- | -- | -- | ||||||
| Pullus | 18-06-2023 | 5.625.263 | g-8|T | 765 | 205 | 103,6 | Herring type. With HG parent (?) later this date. | |||||
| Pullus | 18-06-2023 | 5.625.267 | g-8|S | -- | -- | -- | Bleeding head wound, not measured. | |||||
| Pullus | 25-06-2023 | 5.625.265 | g-8|U | 847 | 241 | 109 | ||||||
| 19-2023 | ||
| dam: | dam 1 east | |
| location: | Low on N-side of dam. In blackberry complex. Location is nest 19-2020/22, old code still readable. | |
| breeders: | cach x teus | |
| OBSERVATIONS: | ||
| 09-04-2023 | adult: | 2 unringed cach present at blocks on N side, in front of location. Search for nest today. |
| 26-04-2023 | nest: | same location, old codes still present. Refreshed with spray. |
| eggs: | 1x egg, egg is cold. Nest abandoned? Egg measured. | |
| comment: | This used to be an early nest, 3 eggs should be floating already this date. In retrospect: late, as one parent is now Herring Gull? | |
| 13-05-2023 | adult: | partner 1 = cach adult. |
| 18-05-2023 | nest: | 3 eggs. |
| 27-05-2023 | pulli: | 3x chicks ringed and measured. |
| 18-06-2023 | pulli: | 3x chicks present, but not in category 'fledged', still too young. |
| pullus: | g-8|S with terrible head wound, therefore not measured. Will probably not survive. | |
| pullus: | g-8|T between blocks, was checked upon by adult Herring Gull, close to nest site. Hence: at least one parent is Herring!? | |
| 25-06-2023 | pullus: | g-8|U caught and measured. |
below: Caspian Gull cachinnans 8|U 1CY, July 15 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 8|U 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Note Herring-type GC pattern and Herring-type tertial pattern.
below: Caspian Gull cachinnans 8|U 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 8|U 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 8|U 1CY, May 27 2023, Lelystad colony, the Netherlands.
Smallest chick of the nest.
