Stig Brettum
| Species | Scientific name | 2021 |
|---|---|---|
| Blue Tit | Cyanistes caeruleus | 1 |
| Chaffinch | Fringilla coelebs | 1 |
| Great Spotted Woodpecker | Dendrocopos major | 1 |
| Great Tit | Parus major | 1 |
| Nuthatch | Sitta europaea | 1 |
| Crested Tit | Lophophanes cristatus | 1 |
Sustain.no is provided by the Norwegian Centre for Science Education
Responsible editor: Doris Jorde