Coordinators:
Albert de Jong
Leon Kelder
Roland-Jan Buijs
Thijs Horst
Merijn Loeve
Mars Muusse
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Herring Gull argenteus hybrid? 7|5 1CY, May - July 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.
Tibia ring G-7|5 and metal NLA 5.556.424, ringed as pullus Larus argenteus on May 18 2023 in nest 63 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? |
teus x ? |
63-2023 |
73,7 |
51,3 |
97,66 |
72,5 |
52 |
98,71 |
70,1 |
50,5 |
90,01 |
286,37 |
same as 2022 |
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ring pulli: May 22nd. |
laying A egg: April 17th. |
hatch A egg: May 15th. |
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catch: |
date: |
metal: |
darvic: |
mass: |
wing: |
head+bill: |
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Pullus |
18-05-2023 |
5556423 |
G-7|4 |
64 |
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48 |
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Pullus |
18-05-2023 |
5556424 |
G-7|5 |
105 |
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53 |
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Pullus |
18-05-2023 |
5556425 |
G-7|6 |
118 |
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55 |
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Pullus |
18-06-2023 |
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g-7|4 |
1137 |
263 |
115,8 |
HG type |
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Pullus |
25-06-2023 |
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G-7|4 |
1109 |
311 |
121,7 |
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G-7|5 |
1039 |
326 |
124,1 |
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G-7|6 |
896 |
325 |
114,3 |
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63-2023 |
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dam: |
dam 1 west |
location: |
Is nest 63-2021/22. From cluster 60-62-63. |
breeders: |
teus x ? |
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OBSERVATIONS: |
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09-04-2023 |
nest: |
no eggs, nest is ready. |
22-04-2023 |
nest: |
3 eggs, water test: bottom 40 degrees, bottom 30 degrees, bottom flat. |
18-05-2023 |
pullus |
3 chicks ringed |
18-06-2023 |
pullus |
1x control: g-7|4 is Herring type, 32 days old. |
25-06-2023 |
pullus |
3x chicks fledged |
below: Herring Gull argenteus hybrid? 7|5 1CY, July 08 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.



below: Herring Gull argenteus hybrid? 7|5 1CY, June 25 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst & Mars Muusse.


below: Herring Gull argenteus hybrid? 7|5 1CY, May 18 2023, Lelystad colony, the Netherlands. Picture: Thijs Horst.

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