Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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Caspian Gull cachinnans 7|S 1CY, May - July 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Tibia ring G-7|S and metal NLA 5.556.408, ringed as pullus Larus cachinnans on May 18 2023 in nest 112 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 112-2023 74,6 51,7 100,40 74,2 51 97,17 71,2 50,2 90,34 287,91 same as 2022
ring pulli: May 09. laying A egg: April 06. hatch A egg: May 04.
catch: date: metal: darvic: mass: wing: head+bill:
Pullus 18-5-2023 5.556.407 G-7|R 123 59,6
Pullus 18-5-2023 5.556.408 G-7|S 84 53
Pullus 27-5-2023 5.556.407 g-7|R 382
Pullus 27-5-2023 5.625.270 g-8|Z 538
Pullus 18-6-2023 5.556.408 g-7|S
 
112-2023
dam: dam 1 east
location: Top of dam. On S-side: red/white traffic sign, nest 112 is just east of it. Same nest as 112-2022
breeders: cach x cach
OBSERVATIONS:
09-04-2023 adult: Unringed cach present at location. So search for nest today.
26-04-2023 adult: Unringed cach present at location.
nest: Almost within Elder (vliertje), old red spot visible. Yellow/black flag in Elder. Top of dam, 25 m W of 19.
eggs: 3x egg, measured. A 90 - tip bottom
B 90 - tip bottom
C 80 - tip bottom
11-05-2023 eggs: 3 eggs
13-05-2023 adult: female = cach thayeri. Male is cach.
18-05-2023 pulli: 2 chicks ringed, 3rd not found.
27-05-2023 pulli: 3rd chick ringed today, near waterfront at S-side.
18-06-2023 pulli: g-7|S at waterfront.
25-06-2023 adult: thayeri and all 3 chicks present. 3x fledged.

below: Caspian Gull cachinnans 7|S 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7|S 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans 7|S 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 7|S 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.