Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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Caspian Gull cachinnans 8.E 1CY, May - July 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Tibia ring R-8.E and metal NLA 5.556.477, ringed as pullus Larus cachinnans on May 11 2023 in nest 21 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 cach 21-2023 69,5 53,1 98,67 67,8 52,9 95,53 66,4 51,4 88,33 282,52 same as 2022
ring pulli: 14-mei laying A egg: 9-apr hatch A egg: 7-mei
     
catch: date: metal: darvic:            
Pullus 11-05-2023 NLA 5556475 r-8.D
Pullus 11-05-2023 NLA 5556476 r-8.Y
Pullus 11-05-2023 NLA 5556477 r-8.E  
Pullus 18-06-2023 NLA 5556477 r-8.E
Pullus 18-06-2023 NLA 5556475 r-8.D
 
21-2023
dam: dam 1 T-split
location: Nest "white jerrycan in de oksel". Same as 21-2020/2022.
breeders: cach x cach
OBSERVATIONS:
09-04-2023 adult:  adult cachinnans at nest.
nest:  1 egg measured. No watertest.
26-04-2023 adult: 1x adult at nest.
eggs: 3x egg, measured. No water test, as ringing date known from A-egg date April 9th.
11-05-2023 pulli: 3 chicks ringed.
13-05-2023 adult both parents photographed: cach. Partner 1 with extra P8 mirror is same as 2022.
18-06-2023 pulli: large chicks r-8D and r-8E at nest site.
25-06-2023 pulli: r-8D and r-8E present.

below: Caspian Gull cachinnans 8.E 1CY, July 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.E 1CY, July 15 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.E 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.E 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.E 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.E 1CY, May 11 2023, Lelystad colony, the Netherlands.