Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
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Caspian Gull cachinnans R|P 1CY, 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.
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Tibia G-R|P and metal NLA 5.641.911, 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 g-N|U.
Father: adult Caspian Gull g-M|9.
Nest: g-M|9 & g-N|U. In 2025, g-R|P fledged. Fledging rate for this nest 2025 = 1,0.
Recoveries:
09-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
29-06-2025 Lelystad (Bataviahaven), Flevoland, NL 5.230,00 N 525,00 E colourring read T. Horst & M. Muusse
Data for nest g-M|9 & g-N|U.
| NEST code |
parent 1 |
parent 2 |
A_length |
A_width |
A_volume |
B_length |
B_width |
B_volume |
C_length |
C_width |
C_volume |
TOTAL NEST: |
|
# eggs |
| g-M|9 |
cach |
cach |
71,2 |
49,9 |
|
67,1 |
48,9 |
|
66,5 |
48,5 |
|
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|
3 |
| dam: |
dam 2 T |
| location: |
end of pier at T-split dam 2, underneath green lighthouse, new nest.
|
| parents: |
New. Both Caspian Gulls trapped this season, now male is g-M|9 and female is g-N|U. |
| ringed: |
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| date |
darvic |
metal |
location / nest# |
species |
sexe |
age |
wing |
mass |
head+ bill |
bill |
tarsus |
gonys |
greyscale |
|
| 28-04-2025 |
g-M|9 |
6254495 |
dam 2 lighthouse |
PONT |
M |
>4CY |
463 |
1241 |
137,1 |
65,6 |
72,7 |
21 |
|
|
| 01-05-2025 |
g-N|U |
5641023 |
dam 2 lighthouse |
PONT |
F |
5CY |
443 |
966 |
122,5 |
55,1 |
70 |
18,2 |
|
|
| 31-05-2025 |
g-R|P |
5641911 |
g-M|9 en g-N|U |
PONT |
|
pullus |
|
522 |
|
ringed pullus |
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|
| 14-06-2025 |
g-R|P |
|
dam 2 WATER |
PONT |
|
pullus |
|
746 |
|
CONTROL |
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| OBSERVATIONS: |
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| 28-04-2025 |
nest |
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|
nest |
male cachinans trapped on nest, now g-M|9
|
| 01-05 |
adult |
trapped female, Male present as well
|
|
egg |
3x eggs |
| 31-05 |
chicks |
trapped one chick, other 2 not found
|
| 09-06 |
chicks |
g-R|P present and trapped, not measured
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| 14-06-2025 |
chicks |
g-R|P caught on water, probably only chick.
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below: Caspian Gull cachinnans R|P 1CY, June 29 2025, colony Lelystad, the Netherlands. Picture: Thijs Horst.

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

below: Caspian Gull cachinnans R|P 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|P |
.5641911 |
g-M|9 en g-N|U |
PONT |
|
pullus |
|
522 |
|
|
|
|
Ringed pullus |
| 14-06-2025 |
G-R|P |
|
dam 2 WATER |
PONT |
|
pullus |
|
746 |
|
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