Larus cachinnans in the Netherlands

(last update: August 16, 2020)

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Caspian Gull cachinnans 8|E 1CY-2CY, June 2023 - February 2024, the Netherlands & Spain. Picture: Xabier Varela, Antonio López Porto, Thijs Horst & Mars Muusse.

Tibia ring G-8|E and metal NLA 5.625.253, ringed as pullus Larus cachinnans on May 27 2023 in nest 223 at Lelystad, the Netherlands. Ringed by Merijn Loeve / Roland-Jan Buijs ringing team.

Recoveries:
27-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
18-06-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
08-07-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
27-01-2024 O Burgo (Ría do Burgo), A Coruña, SPANJE 4.320,00 N 822,00 W colourring read Antonio López Porto
19-02-2024 Arteixo (Strand), A Coruña, SPANJE 4.318,00 N 833,00 W colourring read Xabier Varela

Data for this nest:

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 223-2023 77,1 50,4 98,61 73,9 47 82,19 71,3 47,7 81,68 262,48 ?
ring pulli: May 28 laying A egg: April 23 hatch A egg: May 21
     
catch: date: metal: darvic: mass: wing: head+bill: bill: gonys: greytone:
Pullus 27-5-2023 5.625.251 g-8|B 70
Pullus 27-5-2023 5.625.252 g-8|D 120
Pullus 27-5-2023 5.625.253 g-8|E 136
Pullus 18-6-2023 g-8|E 773 206 105,9
Pullus 18-6-2023 g-8|B 671 174 96,9
 
223-2023 (was yX540-2022)
dam: dam 2 central
location: 5 mtr N of nest 17, visible from N-side. Same as 2022, then X540.
breeders: cach x cach
OBSERVATIONS:
04-04-2023 adult: 2 cach present, but not y-X540.
09-04-2023 nest: empty, but nest is ready.
26-04-2023 nest: 2 eggs. Location is old red spot = 223/yX540. Eggs measured, no water test.
11-05-2023 nest: 3 eggs, C egg measured
18-05-2023 nest: 3 eggs
27-05-2023 pulli: 3x ringed.
18-06-2023 pulli: g-8|B & g-8|E trapped in water, with net. Measured. Not in fledged cohort, too young.
08-07-2023 pulli: g-8|B, g-8|D & g-8|E present: 3 chicks fledged.

below: Caspian Gull cachinnans 8|E 2CY, April 01 2024, Almere - De Vaart, the Netherlands. Picture: Eric Roeland.

below: Caspian Gull cachinnans 8|E 2CY, February 19 2024, A Coruña, Spain. Picture: Xabier Varela.

below: Caspian Gull cachinnans 8|E 2CY, January 27 2024, A Coruña, Spain. Picture: Antonio López Porto.

below: Caspian Gull cachinnans 8|E 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

below: Caspian Gull cachinnans 8|E 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.