Site: Skien
| Species | Scientific name | 2025 |
|---|---|---|
| Chaffinch | Fringilla coelebs | 1 |
| Mew Gull | Larus canus | 1 |
| Osprey | Pandion haliaetus | 1 |
| Eurasian Siskin | Spinus spinus | 1 |
| Grey Heron | Ardea cinerea | 1 |
| Mealy Redpoll | Acanthis flammea | 1 |
| House Sparrow | Passer domesticus | 1 |
| White-tailed Eagle | Haliaeetus albicilla | 1 |
| Northern Goshawk | Accipiter gentilis | 1 |
| Jackdaw | Corvus monedula | 1 |
| Canada Goose | Branta canadensis | 1 |
| Hawfinch | Coccothraustes coccothraustes | 1 |
| Mute Swan | Cygnus olor | 1 |
| Common Goldeneye | Bucephala clangula | 1 |
| White Wagtail | Motacilla alba | 1 |
| Barn Swallow | Hirundo rustica | 1 |
| Blackcap | Sylvia atricapilla | 1 |
| Wood Pigeon | Columba palumbus | 1 |
| Red-breasted Merganser | Mergus serrator | 1 |
| Western Marsh Harrier | Circus aeruginosus | 1 |
| Reed Bunting | Emberiza schoeniclus | 1 |
| Great Cormorant | Phalacrocorax carbo | 1 |
| Great Crested Grebe | Podiceps cristatus | 1 |
| Northern Lapwing | Vanellus vanellus | 1 |
