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Coordinator: Albert de Jong Merijn Loeve Roland-Jan Buijs Thijs Horst Leon Kelder Mars Muusse |
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location | April 12th, 2022: location of nest. | April 19th, 2022: location of nest. | April 27th, 2022: coded nest. |
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eggs | April 27th, 2022: 3 eggs in nest. | June 2nd, 2022: 2 chicks at nest. | |
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partner 1 | May 17th, 2022: female Caspian Gull thayeri. | April 19th, 2022: female Caspian Gull thayeri. | April 27th, 2022: female Caspian Gull thayeri. |
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partner 1 | April 27th, 2022: female Caspian Gull thayeri. | May 22nd, 2022: female Caspian Gull thayeri. | May 22nd, 2022: female Caspian Gull thayeri. |
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partner 1 | May 13th, 2023: hybrid type Caspian Gull. | May 13th, 2023: hybrid type Caspian Gull. | May 13th, 2023: hybrid type Caspian Gull. |
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partner 2 | April 27th, 2022: adult male Caspian Gull. | April 12th, 2022: adult male Caspian Gull. | April 27th, 2022: adult male Caspian Gull. |
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April 27th, 2022: adult male Caspian Gull. | April 27th, 2022: adult male Caspian Gull. | . | |
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pullus | May 30th, 2022 pullus r[6.2]. | May 30th, 2022 pullus r[6.3]. | August 2nd, 2022 pullus r[6.2]. |
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Visits and data 2022 for nest 135:
Estimation egg laying: A-egg = April 16 2022. Estimating hatching = May 14 2022.
date: | |||||||
15-04-2022 | Nest ready. Still empty. With adult Caspian Gull. | ||||||
19-04-2022 | Adult female thayeri now here. | ||||||
egg no: | width (mm): | length (mm): | volume (cm3): | water test | |||
27-04-2022 | A egg | 50,9 | 73,4 | -- | 90 - tip on bottom | ||
B egg | 50 | 75,9 | float - 1 mm | ||||
C egg | 51,9 | 74,5 | -- | 90 - tip on bottom | |||
sum nest: | -- | ||||||
04-05-2022 | Adult breeding at nest. | ||||||
30-05-2022 | 2 chicks at nest. | ||||||
metal | darvic | mass | wing | H+B | Bill | ||
pullus | .5625178 | r-6.2 | 472 | 115 | 85,8 | 33,6 | |
pullus | .5625179 | r-6.3 | 411 | 70 | 83,6 | 29,5 | |
02-06-2022 | 2 adults at nest and 2 chicks, no rings visible. | ||||||
21-06-2022 | Adult thayeri at nest. Easy on bread. | ||||||
28-06-2022 | Adult thayeri at nest. Easy on bread. | ||||||
12-07-2022 | Adult thayeri at nest. Moult: P2/P5. With r-62. | ||||||
17-07-2022 | Adult thayeri at nest. | ||||||
egg sizes & volume 2023 | ||||||||||||
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 hybrid | 135-2023 | 0 | 0 | 0,00 | 0 | 0 | 0,00 | 0 | 0 | 0,00 | 0,00 | no |
ring pulli: | laying A egg: | hatch A egg | ||||||||||
135-2023 | |||||
dam: | dam 1 east | ||||
location: | was thayeri 2022. In bend on N-side, in blackberry complex. 135 coded on block. | ||||
breeders: | cach x hybrid | ||||
OBSERVATIONS: | |||||
9-4-2023 | adult: | 2 unringed cach present at blocks on N side, in front of location. So search for nest today. | |||
26-4-2023 | adult: | Unringed cach present, partner breeding. | |||
nest: | Exact same location as 2022. | ||||
eggs: | 1x egg, mini-wind egg. Not measured. | ||||
13-5-2023 | adult: | cach type breeding. Broad medial band P10 suggests some sort of hybrid origin. Note also black on P4 and thick bill, not unlike michahellis. | |||
18-5-2023 | nest: | failed, 1 rotten egg. No chicks found. |