Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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Caspian Gull cachinnans 7.+ 1CY, May 11 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.

Tibia ring R-7.+ and metal NLA 5.556.458, ringed as pullus Larus cachinnans on May 11 2023 in nest 252 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:
cach x cach 252-2023 73,5 48,1 85,62 74 49,2 90,19 70,5 49 85,23 261,04
ring pulli: May 12 laying A egg: April 07 hatch A egg: May 05
     
catch: date: metal: darvic:
pullus 11-5-2023 5.556.457 r-7.9 few days old
pullus 11-5-2023 5.556.458 r-7.+ few days old
pullus 18-5-2023 mass: head+bill: nothing present
pullus 27-5-2023 5.625.262 g-8|8 577 262
   
252-2023 Nest "dustbin" (Vuilnisbakkie)
dam: dam 2 central
location: 2 mtr W of nest 18 "nest with blue rope". Black plastic sprayed with white + sign.
breeders: cach x cach
OBSERVATIONS:
09-04-2023 nest: 2 eggs measured. No watertest.
26-04-2023 nest: 3 eggs. Measured.
27-04-2023 adult: adult female cach & 5/6CY male cach
11-05-2023 pulli: 2 chicks ringed, other chick?
13-05-2023 adult:
18-05-2023 pulli: Nest empty, no chicks found
27-05-2023 pulli: 1x extra pullus ringed and measured.
25-06-2023 pulli: G-8|8 present.

below: Caspian Gull cachinnans 7.+ 1CY, May 11 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.