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Coordinator: Albert de Jong Merijn Loeve Roland-Jan Buijs Thijs Horst Leon Kelder Mars Muusse |
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partner 1: | April 23rd, 2021: adult r-K.J (more images). | July 30th, 2021: partner is Herring Gull. | . |
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pulli: | May 28th, 2021: pullus r[B.0]. | . | . |
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prey: | May 28th, 2021: Black-headed Gull pullus. | . | . |
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Visits and data.
Date: | details: | ||||||
23-4-2021 | 1 egg in nest. | egg no: | width (mm): | length (mm): | volume (cm3): | ||
A egg | 50.6 | 77.0 | |||||
metal: | tibia: | wing: | head + bill: | bill: | |||
Adult trapped at nest: hybrid Caspian x Herring Gull.. | NLA 6.211.443 | Red-K.J | 455.0 | 127.3 | 59.7 | ||
mass: | tarsus: | moult score: | bill height: | grey scale | Swob | ||
1156 | 70.3 | 10x0 | 20.0 | 4 | 1085 | ||
14-5-2021 | 3 eggs in nest. | ||||||
20-5-2021 | 2 eggs in tact, 1 egg is hatching. | ||||||
28-5-2021 | 1 egg & 1 chick in nest. | metal: | tibia: | mass (gr): | head + bill: | tarsus: | |
Prey: Black-headed Gull pullus. | NLA 5.556.769 | Red B.0 | 203 | 65.4 | -- | ||
Unringed adult seems Herring Gull argentatus. | |||||||
https://waarneming.nl/observation/215267487/ | |||||||
30-7-2021 | 2 adults at sign pole. No chicks around. | ||||||
https://waarneming.nl/observation/221541140/ | |||||||