Larus cachinnans in the Netherlands
(last update: August 16, 2020)
Caspian Gull cachinnans 7.4 1CY-2CY, May 2023 - September 2024, Lelystad & Wervershoof, the Netherlands. Picture: Jeroen van Assema, Thijs Horst & Mars Muusse.
Tibia ring R-74 and metal NLA 5.556.451, ringed as pullus Larus cachinnans on May 11 2023 in nest 231 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.
Recoveries:
11-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
18-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
18-06-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
26-06-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
08-07-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
18-07-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
29-06-2024 IJsselmeer (De Kreupel), Noord-Holland, NL 5.247,00 N 513,00 E colourring read Leon Kelder
01-09-2024 Wervershoof (Vooroever), Noord-Holland, NL 5.245,00 N 507,00 E colourring read Jeroen van Assema
| 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 cach | 231-2023 | 66,7 | 50,5 | 85,65 | 66,5 | 51,9 | 90,19 | 66,1 | 52 | 89,99 | 265,83 | No |
| ring pulli: | laying A egg: | hatch A egg | ||||||||||
| catch: | date: | metal: | darvic: | mass: | ||||||||
| Pullus | 11-5-2023 | 5.556.451 | r-7.4 | very small chick | ||||||||
| Pullus | 11-5-2023 | 5.556.452 | r-7.5 | small chick | ||||||||
| Pullus | 11-5-2023 | 5.556.453 | r-7.6 | very small chick | ||||||||
| Pullus | 18-5-2023 | r-74 | present | |||||||||
| Pullus | 27-5-2023 | 5.556.452 | r-75 | 730 | wing: | head+bill: | ||||||
| Pullus | 18-6-2023 | r-74 | 1041 | 338 | 118,4 | |||||||
| 231-2023 | nest 'orange football'. | |||||
| dam: | dam 2 west | |||||
| location: | 5 mtr south of 203/204. Near waterfront | |||||
| breeders: | cach x cach | |||||
| OBSERVATIONS: | ||||||
| 04-04-2023 | adult: | 1 cach at nest location. | ||||
| 09-04-2023 | nest: | nest empty | Water test: | |||
| 26-04-2023 | nest: | 3 eggs. Measured & water test: | A | 90 - tip bottom | ||
| B | 90 - tip bottom | |||||
| 27-04-2023 | adult: | breeding female cach | C | 80 - tip bottom | ||
| 11-05-2023 | pulli | 3 chick ringed | ||||
| 13-05-2023 | adult: | 2x cach adults, 1 chick in nest, legs not visible. | ||||
| 18-05-2023 | nest: | R-74 present, other not found | ||||
| 18-06-2023 | pulli | r-74, r-75 & r-76 swimming together, only r-74 trapped & measured. Fledged: 3 chicks. | ||||
| 25-06-2023 | pulli | r-74, r-75 and r-76. All 3 chicks fledged. | ||||
below: Caspian Gull cachinnans 7.4 2CY, September 01 2024, Wervershoof, the Netherlands. Picture: Jeroen van Assema.
below: Caspian Gull cachinnans 7.4 1CY, July 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.4 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.4 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.4 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
below: Caspian Gull cachinnans 7.4 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
below: Caspian Gull cachinnans 7.4 1CY, May 11 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
Still with egg tooth.
