Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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

Tibia ring R-8.N and metal NLA 5.556.490, ringed as pullus Larus cachinnans on May 18 2023 in nest 109 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 ? 109-2023 68,7 50,5 88,21 67,3 49,3 82,36 67 48,4 79,03 249,60 no, same as 2022?
ring pulli: laying A egg: hatch A egg
date?
catch: date: metal: darvic: mass: wing: head+bill:      
Pullus 18-5-2023 5556490 R-8N 170 59
Pullus 18-5-2023 5556491 R-8Z 156 59
 
109-2023
dam: dam 1 T-split
location: Nest "wooden T". Same as 109-2022. only visible from W. Below Spoonbills.
breeders: cach x ?
OBSERVATIONS:
26-04-2023 adult: not recorded. Fast visit because of Spoonbill nests with chicks.
eggs: 3x egg, measured. No water test (quick visit, due to Spoonbills). Eggs are very brown.
13-05-2023 adult: cach present.
18-05-2023 pulli: 2 chicks ringed, 3rd not found

below: Caspian Gull cachinnans 8.N 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.