Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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Lesser Black-backed Gull graellsii 9|F 1CY, May 27 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Tibia ring G-9|F and metal NLA 5.625.282, ringed as pullus Larus fuscus on May 27 2023 in nest 061Z 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?
teus x teus 61Z 67,3 49 81,36 -- -- -- -- -- -- 81,36 same as 2022
ring pulli: nn laying A egg: nn hatch A egg: nn
 
catch: date: metal: darvic: mass: wing: head+bill:
Pullus 27-5-2023 5.625.280 g-8|+ 210 -- teus in cluster of nests.
Pullus 27-5-2023 5.625.282 g-9|F 218 -- KMM Observed it with 2 LBBG parents (positive interaction).
Pullus 27-5-2023 5.625.283 g-9|E 230 -- teus in cluster of nests.
   
61Z Herring Gulls
dam: dam 1 west
location: Is in front of n[F|N]. Same as 61-2023.
breeders: teus x teus
OBSERVATIONS:
22-4-2023 nest 1 egg.
27-4-2023 adult: 2x Herring Gull partners.
13-5-2023 adult: 2x Herring Gull partners.
27-5-2023 pulli: 2x teus pulli ringed. Later a 3rd (g-9|F) pullus ringed at this very same location, believed to belong to 61 as well. But from boat we observed it with LBBG parents (positive interaction).

below: Lesser Black-backed Gull graellsii 9|F 1CY, May 27 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.