Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans hybrid 0:4 5CY, 2026, the Netherlands. Picture: Thijs Horst & Mars Muusse.
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Tibia ring Y-0:4 and metal NLA 5.641.189, ringed as breeding 5CY female Larus cachinnans hybrid on April 27 2026 in nest r-74 & y-0:4 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.
Recoveries:
23-05-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
26-05-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
28-05-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
02-06-2026 Almere (De Vaart), Flevoland, NL 5.224,00 N 514,00 E colourring read Thijs Horst
06-06-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
15-06-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
25-06-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
26-06-2026 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
Visits and data nest r-74 & y-0:4 (2026).
| 2026 | parent 1 | parent 2 | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST:
|
# eggs | |
| r-74 & y-0:4 | cach | hybrid | 75,6 | 48,7 | 74,3 | 50,4 | 73,5 | 49,0 | ||||||
| ringed: | ||||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | tarsus | head+ bill | bill | gonys | mass | barcode | |
| 27-04-2026 | y-0:4 | .5641189 | nest r-74 | HYBRID | F | 5CY | 424 | 67,8 | 119,7 | 53,1 | 19,3 | 770 | 26B02658 | |
| 23-05-2026 | y-1:1 | .5646779 | nest r-74 | HYBRID | - | PULL | ||||||||
| 23-05-2026 | y-1:2 | .5646780 | nest r-74 | HYBRID | - | PULL | ||||||||
| 23-06-2026 | y-1:1 | .5646779 | nest r-74 | HYBRID | - | PULL | 290 | - | 115,3 | 976 | CONTROL | |||
| 26-06-2026 | y-1:1 | .5646779 | nest r-74 | HYBRID | - | PULL | 308 | - | 118,1 | 1043 | CONTROL | |||
OBSERVATIONS:
|
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| 22-04-2026 | nest | 2 eggs, measured. | ||||||||||||
| 26-04-2026 | nest | 3 eggs, measured. | ||||||||||||
| 27-04-2026 | nest | 3 eggs. | ||||||||||||
| parents | Trapped female, now y-0:4. |
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| 27-06-2026 | juv | y-1:1 only fletched juvenile. | ||||||||||||
below: Caspian Gull cachinnans hybrid 0:4 5CY, April 27 2026, colony Lelystad, the Netherlands. Picture: Thijs Horst & Mars Muusse.
| Metal | Darvic | Species | Date | Sex | Age | wing | tarsus | head+ bill | bill | gonys | mass | barcode | Comments | Nest |
| .5641189 | Y-0:4 | PONT | 27-4-2026 | F | 5CY | 424 | 67,8 | 119,7 | 53,1 | 19,3 | 770 | 26B02658 | Trapped by ringer. Breeder on 3 eggs. | nest r-74 |
