Mergus serrator (Red-breasted Merganser)
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| Kurt Erland | Vestland, Norway | 71 | 1 | 0 | 2016-02-02 |
| Maren Erland | Vestland, Norway | 54 | 1 | 0 | 2014-01-03 |
| magnus jenssen | Troms, Norway | 25 | 1 | 0 | 2021-04-24 |
| NOF Møre og Romsdal | Møre og Romsdal, Norway | 24 | 1 | 0 | 2012-05-20 |
| Heine A. Halstensen | Vestland, Norway | 13 | 1 | 1 | 2024-01-27 |
| Leif Are Toresen | Nordland, Norway | 11 | 1 | 0 | 2015-04-03 |
| Alv Ottar Folkestad | Møre og Romsdal, Norway | 10 | 1 | 0 | 2022-01-30 |
| Ole Øystein Nybø | Møre og Romsdal, Norway | 10 | 1 | 0 | 2024-01-28 |
| Morten Brandt | Vestfold, Norway | 9 | 1 | 0 | 2023-01-22 |
| helena uhre eliassen | Nordland, Norway | 8 | 1 | 0 | 2024-01-21 |
| Steve Saltermark | Nordland, Norway | 7 | 1 | 0 | 2022-01-26 |
| Unni R. Bjerke Gamst | Troms, Norway | 7 | 1 | 0 | 2020-01-26 |
| kristian håvarstein stavanger | Rogaland, Norway | 7 | 1 | 0 | 2019-01-27 |
| Birgit Moen Evensen | Nordland, Norway | 6 | 1 | 0 | 2023-01-29 |
| Marith Zahl Jensen | Vestland, Norway | 6 | 1 | 0 | 2024-01-28 |
| Atle Ivar Olsen | Nordland, Norway | 6 | 1 | 0 | 2019-01-26 |
| Arne Kjell Askeland | Rogaland, Norway | 6 | 1 | 0 | 2022-01-06 |
| Kari Johansen | Møre og Romsdal, Norway | 6 | 1 | 0 | 2024-02-02 |
| Gunn-T. Høgstad | Troms, Norway | 6 | 1 | 0 | 2018-01-23 |
| John Skartveit | Vestland, Norway | 5 | 1 | 0 | 2010-12-29 |
| Grethe Nicolaysen | Nordland, Norway | 5 | 1 | 0 | 2022-02-06 |
| Åsmund Berg | Innlandet, Norway | 5 | 1 | 5 | 2020-06-04 |
| Ruth Elisabeth Nesheim | Rogaland, Norway | 5 | 1 | 0 | 2021-01-31 |
| Tore Fredriksen | Vestland, Norway | 5 | 1 | 0 | 2022-01-30 |
| kjell egil jordahl | Møre og Romsdal, Norway | 5 | 1 | 0 | 2023-01-21 |
| Nyborg skole | Trøndelag, Norway | 5 | 1 | 0 | 2004-06-09 |
| Gunnar Bjørn Gade | Vestfold, Norway | 5 | 1 | 0 | 2024-01-27 |
| Roger Lien | Møre og Romsdal, Norway | 5 | 1 | 0 | 2023-02-04 |
| Paal-Magnus Solvang | Nordland, Norway | 5 | 1 | 0 | 2024-01-28 |
| Grethe Bergsholm | Rogaland, Norway | 5 | 1 | 0 | 2020-01-19 |
| Weibell Marie Bakkane | Rogaland, Norway | 5 | 1 | 0 | 2023-01-28 |
| NOF Hordaland | Vestland, Norway | 4 | 1 | 0 | 2007-03-30 |
| Åge Tansø | Vestland, Norway | 4 | 1 | 0 | 2024-01-22 |
| Birger Linga | Vestland, Norway | 4 | 1 | 0 | 2023-01-29 |
| Stryn vidaregåande skule | Vestland, Norway | 4 | 1 | 0 | 2003-06-04 |
| Jens-Are Johansen | Nordland, Norway | 4 | 1 | 0 | 2023-01-30 |
| Ingolf Åsvang | Vestland, Norway | 4 | 1 | 0 | 2022-01-30 |
| Kirsti Hundstad | Troms, Norway | 4 | 1 | 0 | 2024-01-28 |
| Ivar Schjetne | Vestland, Norway | 4 | 1 | 0 | 2016-01-31 |
| Geir Tvervåg | Møre og Romsdal, Norway | 4 | 1 | 0 | 2015-01-25 |
| Kjell Inge Kaldhussæter | Vestland, Norway | 4 | 1 | 0 | 2019-02-09 |
| Johnny Hoem | Møre og Romsdal, Norway | 4 | 1 | 0 | 2020-01-25 |
| Trine Lise Fjelldal | Møre og Romsdal, Norway | 4 | 1 | 1 | 2024-01-28 |
| Pascale Baudonnel | Vestland, Norway | 4 | 1 | 3 | 2022-01-31 |
| Knut Skoghei | Vestland, Norway | 3 | 1 | 0 | 2024-01-28 |
| Morten Jørgen Didriksen | Østfold, Norway | 3 | 1 | 0 | 2016-01-24 |
| Svein Johan Sandal | Vestland, Norway | 3 | 1 | 1 | 2019-01-27 |
| Anita Larsen Henstein | Nordland, Norway | 3 | 1 | 0 | 2022-01-29 |
| Karl Thorvaldsen | Trøndelag, Norway | 3 | 1 | 0 | 2024-01-23 |
| leif eriksen | Telemark, Norway | 3 | 1 | 0 | 2024-01-28 |