Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
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Caspian Gull cachinnans 8|T 1CY, May - June 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Tibia ring G-8|T and metal NLA 5.625.263, ringed as pullus Larus cachinnans on May 27 2023 in nest 019 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.
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 teus |
19-2023 |
74,6 |
53,1 |
105,91 |
0 |
0 |
0,00 |
0 |
0 |
0,00 |
105,91 |
new birds |
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ring pulli: 27-05-2023 |
laying A egg: 26-04-2023 |
hatch A egg: 24-05-2023 |
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catch: |
date: |
metal: |
darvic: |
mass: |
wing: |
head+bill: |
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Pullus |
27-05-2023 |
5.625.263 |
g-8|T |
160 |
-- |
-- |
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Pullus |
27-05-2023 |
5.625.265 |
g-8|U |
80 |
-- |
-- |
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Pullus |
27-05-2023 |
5.625.267 |
g-8|S |
125 |
-- |
-- |
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Pullus |
18-06-2023 |
5.625.265 |
g-8|U |
-- |
-- |
-- |
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Pullus |
18-06-2023 |
5.625.263 |
g-8|T |
765 |
205 |
103,6 |
Herring type. With HG parent (?) later this date. |
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Pullus |
18-06-2023 |
5.625.267 |
g-8|S |
-- |
-- |
-- |
Bleeding head wound, not measured. |
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Pullus |
25-06-2023 |
5.625.265 |
g-8|U |
847 |
241 |
109 |
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19-2023 |
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dam: |
dam 1 east |
location: |
Low on N-side of dam. In blackberry complex. Location is nest 19-2020/22, old code still readable. |
breeders: |
cach x teus |
OBSERVATIONS: |
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09-04-2023 |
adult: |
2 unringed cach present at blocks on N side, in front of location. Search for nest today. |
26-04-2023 |
nest: |
same location, old codes still present. Refreshed with spray. |
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eggs: |
1x egg, egg is cold. Nest abandoned? Egg measured. |
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comment: |
This used to be an early nest, 3 eggs should be floating already this date. In retrospect: late, as one parent is now Herring Gull? |
13-05-2023 |
adult: |
partner 1 = cach adult. |
18-05-2023 |
nest: |
3 eggs. |
27-05-2023 |
pulli: |
3x chicks ringed and measured. |
18-06-2023 |
pulli: |
3x chicks present, but not in category 'fledged', still too young. |
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pullus: |
g-8|S with terrible head wound, therefore not measured. Will probably not survive. |
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pullus: |
g-8|T between blocks, was checked upon by adult Herring Gull, close to nest site. Hence: at least one parent is Herring!? |
25-06-2023 |
pullus: |
g-8|U caught and measured. |
below: Caspian Gull cachinnans 8|T 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.


below: Caspian Gull cachinnans 8|T 1CY, May 27 2023, Lelystad colony, the Netherlands.
Largest chick of the nest.

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