Site: Vollen
| Species | Scientific name | 2013 | 2014 | 2015 | 2017 | 2019 | 2021 | 2023 | 2024 |
|---|---|---|---|---|---|---|---|---|---|
| Blue Tit | Cyanistes caeruleus | 1 | 1 | 1 | 1 | 1 | 1 | 1 | |
| Eurasian Red Squirrel | Sciurus vulgaris | 1 | 1 | ||||||
| House Sparrow | Passer domesticus | 1 | 1 | 1 | 1 | 1 | 1 | ||
| Yellowhammer | Emberiza citrinella | 1 | |||||||
| Northern Goshawk | Accipiter gentilis | 1 | |||||||
| Great Tit | Parus major | 1 | 1 | 1 | 1 | 1 | 1 | 1 | 1 |
| Eurasian Magpie | Pica pica | 1 | 1 | 1 | 1 | 1 | 1 | ||
| Common Blackbird | Turdus merula | 1 | 1 | 1 | 1 | 1 |
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