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Coordinator: Albert de Jong Merijn Loeve Roland-Jan Buijs Thijs Horst Leon Kelder Mars Muusse |
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pulli: | May 20th, 2021: pullus b[D|S]. | May 20th, 2021: pullus b[D|T]. | May 20th, 2021: pullus b[D|U]. |
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June 11th, 2021: pullus b[D|S]. | June 11th, 2021: pullus b[D|S]. | . | |
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June 11th, 2021: pullus b[D|U]. | June 11th, 2021: pullus b[D|U]. | June 11th, 2021: pullus b[D|U]. | |
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prey: | May 20th, 2021: Eel 1x. | May 20th, 2021: Rounded Goby 2x. | May 20th, 2021: Rounded Goby 2x. |
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Visits and data.
Date: | details: | |||||
23-4-2021 | 3 eggs in nest. | egg no: | width (mm): | length (mm): | volume (cm3): | |
A egg | 53.0 | 75.3 | ||||
B egg | 51.0 | 73.7 | ||||
Attempt to trap breeding adult. Failed. | C egg | 52.1 | 78.6 | |||
14-5-2021 | 3 eggs in nest. | |||||
20-5-2021 | 3 pulli in nest. | metal: | tibia: | mass (gr): | head + bill: | tarsus: |
Prey: Rounded Goby 2x; Eel 1x. | NLA 5.556.753 | b-D|S | 149 | 61.1 | 35.0 | |
https://waarneming.nl/observation/214707477/ | NLA 5.556.754 | b-D|T | 108 | 56.3 | 32.8 | |
NLA 5.556.755 | b-D|U | 163 | 62.3 | 36.2 | ||
20-5-2021 | Camera trap near nest: 3 pulli & 2 adults. Caspian Gull cachinnans male y[X311] from Germany & Herring Gull type / hybrid female. | |||||
11-6-2021 | 2 chicks near nest. | metal: | tibia: | mass (gr): | head + bill: | wing: |
https://waarneming.nl/observation/216987545/ | NLA 5.556.753 | b-D|S | 1057 | 110.3 | 240.0 | |
NLA 5.556.755 | b-D|U | 1130 | 114.1 | 249.0 | ||