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Coordinators: Albert de Jong Leon Kelder Roland-Jan Buijs Thijs Horst Merijn Loeve Mars Muusse |
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location | April 27th, 2022: location of nest. | April 27th, 2022: 2 eggs. | April 26th, 2023: 3 eggs. |
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nest | April 26th, 2023: 3 eggs. | June 18th, 2023: adult male Caspian Gull. | May 18th, 2023: 3 chicks. |
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pullus | July 8th, 2023: chick r[8.A]. | June 18th, 2023: chick r[8.B]. | May 18th, 2023: father & chick r[8.M]. |
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Data for nest 131-2022:
Estimation egg laying: A-egg = April 25 2022. Estimating hatching = May 23 2022.
27-Apr-22 | 2 eggs | A egg | 73,3 | 46,2 | tip bottom - 25 gr | Possible LBBG nest? | |
B egg | 69,2 | 46,4 | flat | ||||
17-May-22 | 2 eggs |
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 ? | 131-2023 | 69 | 47,1 | 77,07 | 68,5 | 49,4 | 84,17 | 67,4 | 46,7 | 74,01 | 235,25 | n.n. |
ring pulli: May 11 | laying A egg: | hatch A egg: May 10 2023 | ||||||||||
catch: | date: | metal: | darvic: | mass: | wing: | head+bill: | ||||||
pullus | 11-5-2023 | 5556480 | r-8M | nest with 3 chicks, between micha-nest and nest 'branch with 2 stripes'. Halfway blocks, on top of dam. | ||||||||
pullus | 11-5-2023 | 5556482 | r-8A | |||||||||
pullus | 11-5-2023 | 5556481 | r-8B | |||||||||
pullus | 18-6-2023 | r-8M | ||||||||||
pullus | 18-6-2023 | r-8B | together with r-8A, dam 1 blocks east (branch with 2 stripes after all?) | |||||||||
pullus | 18-6-2023 | r-8A | together with r-8B, dam 1 blocks east (branch with 2 stripes after all?) |
131-2023 | ||||
dam: | dam 1 blokken | |||
location: | is nest 131-2022? 8 m east of PU60. | |||
breeders: | cach x ? | |||
OBSERVATIONS: | ||||
26-4-2023 | eggs: | 3x egg, measured. No water test. Nest in dense cluster between boulders at dam 1. | ||
11-5-2023 | pullus: | 3 chicks ringed here: r-8A, r-8B & r-8M. Uncertainty about adults, about nest, and uncertainty about ID. | ||
27-5-2023 | nest: | The branch with 2 stripes taken away, and placed vertically at (new nest) 26. | ||
18-6-2023 | pullus: | r-8M, r-8A & r-8B present together. With adult cachinnans parent. | ||
25-6-2023 | pullus: | r-8M, r-8A & r-8B present together. 3 chicks fledged. |