Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
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Caspian Gull cachinnans R|0 1CY, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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Tibia G-R|0 and metal NLA 5.641.925, ringed as pullus Larus cachinnans on May 31 2025 at Lelystad, the Netherlands. Ringed by Roland-Jan Buijs ringing team (Mars Muusse / Thijs Horst / Fred Cottaar).
Mother: adult Caspian Gull.
Father: 5CY Caspian Gull b-F|=.
Nest: nest b-F|=.
In 2025 g-R|0 only fledged bird. Fledging rate for this nest 2025 = 1,0.
Recoveries:
13-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
29-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
30-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read Thijs Horst
Data for nest b-F|= (251-2025 "Ariel").
| 2025 |
parent 1 |
parent 2 |
A_length |
A_width |
A_volume |
B_length |
B_width |
B_volume |
| b-F|= (Ariel / 251) |
cach |
cach |
71,4 |
48,9 |
|
70 |
52,2 |
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| dam: |
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| location: |
2 m N of blue sign, loaction of 2024, Ariel / white Buoy
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| parents: |
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| ring pulli: |
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| ringed: |
darvic |
metal |
location / nest# |
species |
sexe |
age |
wing |
mass |
| 31-05-2025 |
G-R|0 |
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PONT |
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pullus |
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780 |
| 09-06-2025 |
G-R|0 |
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CONTROL |
PONT |
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pullus |
|
931 |
| 14-06-2025 |
G-R|0 |
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CONTROL |
PONT |
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pullus |
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1058 |
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| 16-03-2025 |
nest |
1x cach at blue sign, above nest location
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nest |
b-F|= and unringed partner at soos dam 2
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| 20-03 |
nest |
b-F|= present on VHF sign dam 2
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| 25-03 |
nest |
b-F|= present on VHF sign dam 2
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| 01-04 |
nest |
b-F|= present below VHF sign around Ariel nest, but 2 more cachs present
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| 21-04 |
nest |
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| 28-04 |
nest |
2 eggs |
| 08-05 |
adult |
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| 13-05 |
nest |
empty nest, no chicks found
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| 31-05 |
chicks |
g-R|0 caught on water, with X60J alarming above. Ringed & measured. Chick appeared to belong to b-F|= |
| 09-06 |
chicks |
g-R|0 at water again, near nest b-F|=, CONTROL measure. |
| 14-06 |
chicks |
g-R|0 at water again, near nest b-F|=, CONTROL measure. |
below: Caspian Gull cachinnans R|0 1CY, June 30 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
.JPG)

below: Caspian Gull cachinnans R|0 1CY, June 29 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans R|0 1CY, June 09 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.

below: Caspian Gull cachinnans R|0 1CY, May 31 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
| date |
darvic |
metal |
nest |
species |
sexe |
age |
wing |
mass |
head+ bill |
bill |
gonys |
barcode |
comments |
| 31-05-2025 |
G-R|0 |
.5641925 |
water bij b-F|= |
PONT |
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pullus |
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780 |
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Ringed pullus |
| 09-06-2025 |
G-R|0 |
.5641925 |
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PONT |
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pullus |
|
931 |
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| 14-06-2025 |
G-R|0 |
.5641925 |
dam 2 WATER |
PONT |
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pullus |
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1058 |
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