Frithjof Olsen
| Species | Scientific name | 2009 | 2024 |
|---|---|---|---|
| Blue Tit | Cyanistes caeruleus | 1 | 1 |
| Eurasian Bullfinch | Pyrrhula pyrrhula | 1 | 1 |
| Great Spotted Woodpecker | Dendrocopos major | 1 | |
| Willow Tit | Poecile montanus | 1 | 1 |
| European Greenfinch | Carduelis chloris | 1 | |
| Mealy Redpoll | Carduelis flammea | 1 | 1 |
| House Sparrow | Passer domesticus | 1 | 1 |
| Great Tit | Parus major | 1 | 1 |
| Hooded Crow | Corvus cornix | 1 | |
| Eurasian Jay | Garrulus glandarius | 1 | 1 |
| Robin | Erithacus rubecula | 1 | 1 |
| Eurasian Magpie | Pica pica | 1 | |
| Nuthatch | Sitta europaea | 1 | 1 |
| Coal Tit | Periparus ater | 1 | 1 |
| Common Blackbird | Turdus merula | 1 | 1 |
| Eurasian Treecreeper | Certhia familiaris | 1 | 1 |
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