Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
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Breeding biology
Fecundity
Food resources
Nonbreeding season
Breeding species
Hybrid scores
Ring codes
Future |
Caspian Gull cachinnans 7|U 1CY-2CY, May 2023 - December 2024, the Netherlands & England. Picture: Andy Warr, Thijs Horst & Mars Muusse.
Tibia ring G-7|U and metal NLA 5.556.410, ringed as pullus Larus cachinnans on May 18 2023 in nest 229-X56A at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.
Recoveries:
18-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
27-05-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
26-06-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
04-02-2024 Trockmorton (Vuilstort), Worcestershire, ENGELAND 5.208,00 N 202,00 W colourring read Edward Betteridge
08-12-2024 Trockmorton (Vuilstort), Worcestershire, ENGELAND 5.208,00 N 202,00 W colourring read Andy Warr
14-01-2025 Trockmorton (Vuilstort), Worcestershire, ENGELAND 5.208,00 N 202,00 W colourring read Edward Betteridge
egg sizes & volume 2023 |
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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 |
229-2023 |
74 |
50 |
93,15 |
72,7 |
50,5 |
93,35 |
70,2 |
51,5 |
93,75 |
280,24 |
X56A &cach |
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ring pulli: 15-mei |
laying A egg: 10-apr |
hatch A egg: 8-mei |
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catch: |
date: |
metal: |
darvic: |
mass: |
wing: |
head+bill: |
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pullus |
11-5-2023 |
5.556.455 |
r-7Y |
-- |
-- |
-- |
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pullus |
11-5-2023 |
5.556.456 |
r-78 |
-- |
-- |
-- |
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pullus |
18-5-2023 |
5.556.410 |
g-7|U |
166 |
-- |
63 |
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pullus |
18-5-2023 |
5.556.455 |
r-7Y |
221 |
-- |
65 |
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pullus |
27-5-2023 |
5.556.410 |
g-7|U |
362 |
-- |
-- |
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pullus |
27-5-2023 |
5.556.455 |
r-7Y |
499 |
-- |
-- |
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pullus |
25-6-2023 |
5.556.456 |
r-78 |
1028 |
355 |
128,1 |
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229-2023 |
y[X56A] is breeding in 229 (X56A was at nest 206 in 2022) |
dam: |
dam 2 west |
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location: |
25 mtr east of lighthouse, old Spoonbill nest, between bushes = nest 229-2022 of sub-adults. |
breeders: |
cach x cach |
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OBSERVATIONS: |
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09-04-2023 |
y-X56A present north of dam. (27/4: yX56A not breeding at this nest in 2023). |
26-04-2023 |
eggs: |
3 eggs. Measured and water test: A/B/C:all are 90 - tip bottom. |
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nest: |
code 229 sprayed on entrance block. |
27-04-2023 |
adult: |
parent 1 = yX56A |
11-05-2023 |
pulli: |
2 chicks ringed, 3rd egg hatching. |
13-05-2023 |
adult: |
partner 2 is cach. |
18-05-2023 |
pulli: |
2 chicks present (R-7Y and unringed one, which is now ringed). |
27-05-2023 |
pulli: |
2x ringed birds measured: g-7|U & r-7Y. |
18-06-2023 |
adult: |
ad yX56A easy at bread. |
25-06-2023 |
pulli: |
r-78 and g-7|U present. |
below: Caspian Gull cachinnans 7|U 2CY, December 08 2024, Trockmorton, England. Picture: Andy Warr.

below: Caspian Gull cachinnans 7|U 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans 7|U 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.

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