Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans T|M 1CY, 2025, the Netherlands. Picture: Thijs Horst.
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Tibia G-T|M and metal NLA 5.641.082, ringed as pullus Larus cachinnans on May 13 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Mother: g-M|2.
Father: y-PLDP.
Nest: PLDP-2025.
In 2025: g-T|K, g-T|L & g-T|M fledged. Fledging rate for this nest 2025 = 3,0.
Recoveries:
25-05-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
13-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
29-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
09-07-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
20-08-2025 Almere (Dashorstdijk), Flevoland, NL 5.225,00 N 512,00 E colourring read Thijs Horst
Data for this nest in 2025:
| 2025 | parent 1 | parent 2 | A_length | A_width | A_volume | B_length | B_width | B_volume | C_length | C_width | C_volume | TOTAL NEST:
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# eggs | |
| PLDP & g-M|2 | cach | cach | 70,7 | 47,6 | 70,5 | 48,1 | 70 | 50,3 | 3 | |||||
| dam: | dam 1 blocks
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| location: | blocks west part, red flag placed: nest is 2 mtr W,
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| parents: | returned, after 3 years.
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| rings: | ||||||||||||||
| date | darvic | metal | location / nest# | species | sexe | age | wing | mass | head+ bill | bill | tarsus | gonys | greyscale | |
| 23-04-2025 | g-M|2 | 5,641,003 | Nest PLDP | cach | F | >4CY | 442 | 953 | 122 | 56,7 | 62,7 | 18 | 6 | Fred Cottaar |
| 13-05 | g-T|K | 5641080 | PLDP | PONT | pullus | 350 | ||||||||
| 13-05 | g-T|L | 5641081 | PLDP | PONT | pullus | 409 | ||||||||
| 13-05 | g-T|M | 5641082 | PLDP | PONT | pullus | 590 | ||||||||
| 14-06 | G-T|K | PONT | pullus | 766 | ||||||||||
OBSERVATIONS:
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| 16-03 | nest | PLDP again in colony! Blocks dam 1, most western (between nest 53 - nest 22 black shoe),
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| 21-03 | nest | PLDP present same location as 16-3-2025
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| 04-04 | nest | PLDP present, on small part of blocks dam 1, on top of dam
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| 21-04 | nest | PLDP present
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| 23-04 | eggs | 3 eggs, measured,
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| adult | trapped female, now g-M|2, incubating 3 eggs at PLDP,
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| 28-04 | eggs | 1 egg hatching
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| 01-05 | adult | 2x present
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| 05-05 | chick | 3x chicks present
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| 08-05 | adult | both partners present
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| 13-05 | chicks | 3x chicks ringed
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| food | T|K fish bolus, T|M zwartbekgrondel
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| 16-05 | chick | g-T|K found and measured
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below: Caspian Gull cachinnans T|M 1CY, August 20 2025, Oostvaardersdijk - Almere, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans T|M 1CY, July 09 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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below: Caspian Gull cachinnans T|M 1CY, June 29 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
| date | darvic | metal | nest | species | sexe | age | wing | mass | head+ bill | bill | gonys | barcode | comments |
| 13-5-2025 | G-T|M | .5641082 | PLDP | PONT | pullus | 590 | Ringed pullus |