Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
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Breeding biology
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Future |
Caspian Gull cachinnans 7|H 1CY & 3CY, May 2023 - February 2025, the Netherlands & Spain. Picture: Thijs Horst & Mars Muusse.
Tibia ring G-7|H and metal NLA 5.556.500, ringed as pullus Larus cachinnans on May 18 2023 in nest 003 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.
Recoveries:
18-5-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
18-6-2023 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
26-6-2023 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
19-02-2025 Getaria (Strand), Guipúzcoa, SPANJE 4.318,00 N 211,00 W colourring read Oliver Perez Amas
Data and visits for nest 003-2023:
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 |
3-2023 |
77 |
50,5 |
98,87 |
75,6 |
50,5 |
97,07 |
74,5 |
49,5 |
91,91 |
287,86 |
same as 2022 |
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ring pulli: |
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laying A egg: |
hatch A egg |
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10-mei |
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7-apr |
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5-mei |
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catch: |
date: |
metal: |
darvic: |
mass: |
wing: |
head+bill: |
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Pullus |
18-05-2023 |
5556499 |
G-7|G |
95 |
-- |
55 |
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5556500 |
G-7|H |
133 |
-- |
63 |
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18-06-2023 |
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G-7|H |
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25-06-2023 |
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G-7|H |
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nest 003-2023 |
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dam: |
dam 1 east |
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location: |
In bend, visible from S side. Is nest 3-2020/22. |
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breeders: |
cach x cach |
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OBSERVATIONS: |
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04-04-2023 |
adult: |
still no birds present. |
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09-04-2023 |
adult: |
still no birds present. |
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26-04-2023 |
adult: |
adult breeding |
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nest: |
exact location of 2022. |
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eggs: |
3x egg, measured. |
A: 1 mm - float |
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B: 90 - tip bottom |
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C: 90 - tip bottom |
11-05-2023 |
eggs: |
still 3 eggs |
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18-05-2023 |
pulli: |
2 chicks ringed, 3rd not found |
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16-06-2023 |
pulli: |
3x fledged chicks |
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25-06-2023 |
pulli: |
3x fledged chicks, is G-7|G still allive? |
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below: Caspian Gull cachinnans 7|H 3CY, February 19 2025, Getaria - Guipúzcoa, Spain. Picture: Oliver Perez Amas.

below: Caspian Gull cachinnans 7|H 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.



below: Caspian Gull cachinnans 7|H 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.
With unringed sibling. Three chicks fledged from nest 3.

below: Caspian Gull cachinnans 7|H 1CY, June 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

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

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