Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans hybrid 8.+ 1CY, May - September 2023, Lelystad & Amsterdam, the Netherlands. Picture: Jan Zorgdrager, Thijs Horst & Mars Muusse.
Tibia ring R-8|+ and metal NLA 5.556.485, ringed as pullus Larus cachinnans hybrid (L. argentatus x L. cachinnans) on May 18 2023 in nest 154 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.
Recoveries:
20-9-2023 Amsterdam-Westpoort (Vuilverwerking), Noord-Holland, NL 5.224,00 N 451,00 E colourring read Jan Zorgdrager
| 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 | 154-2023 | 74,6 | 51 | 97,70 | 70,6 | 51,9 | 95,75 | 55,2 | 50,5 | 70,88 | 264,33 | NEW NEST |
| ring pulli: | laying A egg: | hatch A egg | ||||||||||
| catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | bill: | gonys: | greytone: | |||
| adult | 03-05-2023 | 6214907 | r-7.P | nn | 449 | 137,2 | 62,2 | 21,3 | 7 | male cachinnans. | ||
| pullus | 18-05-2023 | 5556485 | r-8.+ | 124 | 56 | |||||||
| pullus | 27-05-2023 | 5556485 | r-8.+ | 329 | ||||||||
| 154-2023 | NEW NEST | |
| dam: | dam 1 west | |
| location: | most western nest selected in 2023 at dam 1. | |
| breeders: | cach x teus | |
| OBSERVATIONS: | ||
| 22-04-2023 | nest: | 3 eggs, water test: flat bottom - 3 times (recently laid). |
| 27-04-2023 | adult: | Male cachinnans & female argenteus. Female breeding. |
| 03-05-2023 | adult: | Trapped male cach at nest: r-7.P |
| 13-05-2023 | adult: | Cach r-7P guarding, female teus incubating. |
| 18-05-2023 | pullus: | 1 chick ringed, other 2 not found |
| 27-05-2023 | pullus: | 1x control chick. |
below: Caspian Gull cachinnans hybrid 8.+ 1CY, September 20 2023, Amsterdam, the Netherlands. Picture: Jan Zorgdrager.
below: Caspian Gull cachinnans hybrid 8.+ 1CY, May 27 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans hybrid 8.+ 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
