Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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Caspian Gull cachinnans 8.9 1CY, May - July 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

Tibia ring R-8.9 and metal NLA 5.556.465, ringed as pullus Larus cachinnans on May 11 2023 in nest XCHP 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 XCHP 70,6 52,2 96,86 67 52,7 93,69 68,3 50,8 88,75 279,30 same as 2022
ring pulli: 12-mei laying A egg: 7-apr hatch A egg: 5-mei
     
catch: date: metal: darvic: mass: wing: head+bill:      
Pullus 11-05-2023 5.556.464 r-8S -- -- --
Pullus 11-05-2023 5.556.465 r-89 -- -- --
Pullus 18-05-2023 5.556.465 r-89 550 -- 80,4
Pullus 27-05-2023 5.556.464 r-8S dead > 7 days ago.
Pullus 18-06-2023 r-89 1103 362 130,7
 
XCHP
dam: dam 2 east
location: below large boulders, east side of blocks, closer to bitumen than 2022.
breeders: cach x cach
OBSERVATIONS:
04-04-2023 adult: yXCHP present with partner.
05-04-2023 adult: yXCHP present with partner.
09-04-2023 adult: 2 adult cach present. One is yXCHP.
nest: 2 eggs measured. No watertest, ring chicks in 1st session.
26-04-2023 nest: 3 eggs, all measured. Red spot sprayed on stone.
27-04-2023 nest: 3 eggs.
adult: yXCHP present with partner.
11-05-2023 pulli: 2 chicks ringed, 1 egg rotten
13-05-2023 adult: yXCHP pictures.
18-05-2023 pulli: R-89 present
27-05-2023 pulli: dead chick near nest r-8S, dead >7 days.
18-06-2023 pulli: r-89 present. Fledging success: 1 chick.
25-05-2023 pulli: r-89 present with both parents

below: Caspian Gull cachinnans 8.9 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.9 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.9 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8.9 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.