Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
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Caspian Gull cachinnans 7|N 1CY, May - October 2023, England & the Netherlands. Picture: Clive Saunders, Thijs Horst & Mars Muusse.
Tibia ring G-7|N and metal NLA 5.556.405, ringed as pullus Larus cachinnans on May 18 2023 in nest PNED at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team.
Recoveries:
16-10-2023 Amble Harbour (Strand), Northumberland, ENGELAND 5.520,00 N 134,00 W colourring read Clive Saunders & Ian Fisher
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 |
PNED |
73,4 |
52,1 |
100,32 |
73,1 |
50 |
92,01 |
68 |
49,8 |
84,91 |
277,24 |
same as 2022 |
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ring pulli: 9-mei |
laying A egg: 6-apr |
hatch A egg: 4-mei |
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catch: |
date: |
metal: |
darvic: |
mass: |
wing: |
head+bill: |
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Pullus |
18-05-2023 |
5556405 |
G-7|N |
635 |
-- |
95 |
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Pullus |
18-05-2023 |
5556406 |
G-7|P |
616 |
-- |
92,3 |
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Pullus |
27-05-2023 |
5556405 |
G-7|N |
1030 |
-- |
-- |
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PNED |
nest 136-2022 |
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dam: |
dam 1 east |
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location: |
Visible from N. |
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breeders: |
cach x cach |
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OBSERVATIONS: |
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09-04-2023 |
adult: |
male unringed cach & female cach yPNED present at location. So search for nest today. |
26-04-2023 |
adult: |
male unringed cach & female cach yPNED present at location. |
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nest: |
code 136, birds have moved to this location. "136" sprayed on block + blue foam. |
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eggs: |
3x eggs, measured. |
A |
1 mm - float |
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B |
1 mm - float |
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C |
1 mm - float |
13-05-2023 |
adult: |
cach male. |
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18-05-2023 |
pulli: |
2 chicks ringed, 3rd not found. |
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27-05-2023 |
pulli: |
1 chick measured. |
18-06-2023 |
pulli: |
g-7|P & g-7|N present + unringed sibling. 3x fledged from PNED. |
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adult: |
y-PNED present. Unringed male guarding g-7|P. |
25-06-2023 |
pulli: |
g-7|N alone, g-7|P with unringed sibling. |
below: Caspian Gull cachinnans 7|N 1CY, October 16 2023, Amble Harbour - Northumberland, England. Picture: Clive Saunders.

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




below: Caspian Gull cachinnans 7|N 1CY, July 15 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.

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

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

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


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

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