Species: Mute Swan (Cygnus olor)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| øvre bragernes | Buskerud, Norway | 1 | 1 | 0 | 2018-02-04 | |
| Øyeren natureservat | Akershus, Norway | 6 | 1 | 0 | 2020-02-22 | |
| Øystese | Vestland, Norway | 1 | 1 | 1 | 2013-03-24 | |
| Øystese | Vestland, Norway | 4 | 1 | 0 | 2024-01-28 | |
| Ådlandsvatnet | Vestland, Norway | 1 | 1 | 0 | 2014-01-21 | |
| Ågotnes | Vestland, Norway | 1 | 1 | 0 | 2021-02-01 | |
| Åkvika | Møre og Romsdal, Norway | 6 | 1 | 0 | 2022-01-30 | |
| Åsevegen 40 | Rogaland, Norway | 1 | 1 | 0 | 2022-01-30 |
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