Gavia arctica (Black-throated Diver)
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| NOF Hordaland | Vestland, Norway | 17 | 1 | 0 | 2008-04-24 |
| Martin Andreas Ressem Målø | Trøndelag, Norway | 11 | 1 | 0 | 2024-05-01 |
| Åsmund Berg | Innlandet, Norway | 10 | 1 | 8 | 2021-05-01 |
| Edin Reinholtsen | Nordland, Norway | 6 | 1 | 0 | 2024-04-28 |
| Anita | Agder, Norway | 4 | 1 | 0 | 2019-04-22 |
| Dag Audun Tesaker Tollaksen | Agder, Norway | 2 | 1 | 0 | 2010-05-07 |
| Trond Helge Jensen | Troms, Norway | 2 | 1 | 0 | 2017-05-30 |
| Olaf Hunsdal | Troms, Norway | 2 | 1 | 0 | 2008-05-02 |
| Kvadraturen Skolesenter | Agder, Norway | 2 | 1 | 0 | 2014-07-25 |
| Liv Hilmarsen | Innlandet, Norway | 2 | 1 | 0 | 2009-05-13 |
| Per Torgersen | Akershus, Norway | 2 | 1 | 0 | 2016-04-24 |
| Astrid Hagelund | Finnmark, Norway | 1 | 1 | 0 | 2012-01-29 |
| petter antonsen | Oslo, Norway | 1 | 1 | 0 | 2010-05-01 |
| Sture Thorgaard | Trøndelag, Norway | 1 | 1 | 0 | 2020-06-01 |
| Harry Bernhard Larsen | Buskerud, Norway | 1 | 1 | 0 | 2011-06-02 |
| Gunn Thoresen | Innlandet, Norway | 1 | 1 | 0 | 2014-05-18 |
| Hans Høydalsvik | Oslo, Norway | 1 | 1 | 0 | 2011-06-21 |
| lissel jacobsen | Innlandet, Norway | 1 | 1 | 0 | 2012-05-10 |
| Paal-Magnus Solvang | Nordland, Norway | 1 | 1 | 0 | 2019-05-08 |
| Olav Tveiterås | Nordland, Norway | 1 | 1 | 0 | 2015-05-22 |
| Nils Battin | Agder, Norway | 1 | 1 | 0 | 2015-05-07 |
| Setesdal Videregåande skule avd Hornnes | Agder, Norway | 1 | 1 | 0 | 1989-08-30 |
| Ronny Sværen | Vestland, Norway | 1 | 1 | 0 | 2018-05-06 |
| Fauske videregående skole | Nordland, Norway | 1 | 1 | 0 | 1992-05-27 |
| Bjørkelangen videregående skole | Akershus, Norway | 1 | 1 | 0 | 1991-06-12 |
| Sunndal vidaregåande skole | Møre og Romsdal, Norway | 1 | 1 | 0 | 1994-11-22 |
| Lianvatnet skole/Skoleavdelingen Bup-Klinikk | Trøndelag, Norway | 1 | 1 | 0 | 2008-08-26 |
| Odd Ivar Woll | Troms, Norway | 1 | 1 | 0 | 2008-04-27 |
| Nordisk Naturskule Eidfjord | Vestland, Norway | 1 | 1 | 0 | 2007-05-02 |
| Tove Bruun | Akershus, Norway | 1 | 1 | 0 | 2018-09-04 |
| helen lorraine jacobsen | Buskerud, Norway | 1 | 1 | 0 | 2013-05-03 |
| Lars Otto eide | Trøndelag, Norway | 1 | 1 | 0 | 2009-05-02 |
| Dagfin Leine | Innlandet, Norway | 1 | 1 | 0 | 2021-05-10 |