Chroicocephalus ridibundus (Black-headed Gull)
| Deltaker | Kommune (fylke) | Ant. obs. | Ant. arter | Ant. bilder | Siste obs. |
|---|---|---|---|---|---|
| Stryn vidaregåande skule | Vestland, Norway | 174 | 1 | 0 | 2020-05-27 |
| NOF Hordaland | Vestland, Norway | 34 | 1 | 0 | 2008-04-05 |
| Åsmund Berg | Innlandet, Norway | 13 | 1 | 5 | 2024-04-15 |
| Stryn ungdomsskule | Vestland, Norway | 9 | 1 | 0 | 2007-05-03 |
| Olaf Hunsdal | Troms, Norway | 8 | 1 | 0 | 2014-05-04 |
| Martin Andreas Ressem Målø | Trøndelag, Norway | 8 | 1 | 0 | 2023-04-13 |
| Charlotte Bakke | Telemark, Norway | 7 | 1 | 0 | 2020-04-24 |
| Victor Boullet | Akershus, Norway | 7 | 1 | 0 | 2019-07-07 |
| Egil Bruvold | Oslo, Norway | 5 | 1 | 0 | 2012-03-28 |
| Kurt Erland | Vestland, Norway | 4 | 1 | 0 | 2015-05-23 |
| Rognan ungdomsskole | Nordland, Norway | 4 | 1 | 0 | 2013-06-17 |
| NOF Møre og Romsdal | Møre og Romsdal, Norway | 4 | 1 | 0 | 2006-04-26 |
| Tor Magnus Hansen | Innlandet, Norway | 4 | 1 | 0 | 2010-05-13 |
| Kristoffer Kiærbech | Troms, Norway | 4 | 1 | 0 | 2020-04-25 |
| Nyborg skole | Trøndelag, Norway | 4 | 1 | 0 | 2004-06-09 |
| Elly Hardy Bakstad | Vestfold, Norway | 4 | 1 | 0 | 2012-03-29 |
| Erik Imerslund | Finnmark, Norway | 4 | 1 | 0 | 2016-05-08 |
| Nordnes skole | Vestland, Norway | 4 | 1 | 0 | 2006-05-30 |
| Per Torgersen | Akershus, Norway | 4 | 1 | 0 | 2024-04-25 |
| Richard | Akershus, Norway | 4 | 1 | 0 | 2019-03-24 |
| Frank Markussen | Nordland, Norway | 3 | 1 | 0 | 2019-04-25 |
| Lars Slettom | Trøndelag, Norway | 3 | 1 | 0 | 2008-04-04 |
| Fauske videregående skole | Nordland, Norway | 3 | 1 | 0 | 1993-06-03 |
| Ingrid Gausdal | Oslo, Norway | 3 | 1 | 0 | 2023-01-28 |
| Kirsten Henriksen | Trøndelag, Norway | 3 | 1 | 0 | 2018-05-09 |
| Arve Henningsen | Nordland, Norway | 3 | 1 | 0 | 2008-03-30 |
| Liv Anne | Akershus, Norway | 2 | 1 | 0 | 2015-05-01 |
| Pascale Baudonnel | Vestland, Norway | 2 | 1 | 1 | 2010-05-03 |
| Rolf Arne Haugen | Møre og Romsdal, Norway | 2 | 1 | 0 | 2013-04-13 |
| Nils Neteland | Nordland, Norway | 2 | 1 | 0 | 2018-04-18 |
| Odd Audun Granaas | Oslo, Norway | 2 | 1 | 0 | 2014-03-24 |
| Roy Iversen | Vestfold, Norway | 2 | 1 | 0 | 2019-01-27 |
| Trude Rosenheim | Rogaland, Norway | 2 | 1 | 0 | 2018-04-18 |
| Edin Reinholtsen | Nordland, Norway | 2 | 1 | 0 | 2020-05-17 |
| Ina B. Westbye | Østfold, Norway | 2 | 1 | 0 | 2014-03-30 |
| Baard C | Oslo, Norway | 2 | 1 | 0 | 2009-03-23 |
| Terje Bjerkan | Trøndelag, Norway | 2 | 1 | 0 | 2013-01-27 |
| Birgit Kværnø | Nordland, Norway | 2 | 1 | 0 | 2020-03-30 |
| Egil Bruvold | Oslo, Norway | 2 | 1 | 0 | 2014-03-26 |
| Marianne Siljehaugen | Innlandet, Norway | 2 | 1 | 0 | 2019-04-28 |
| Finn Jørgensen | Agder, Norway | 2 | 1 | 0 | 2010-01-31 |
| Geir Sverre Grimsby | Agder, Norway | 2 | 1 | 0 | 2016-01-24 |
| Arnfinn Linnbar | Akershus, Norway | 2 | 1 | 0 | 2017-01-23 |
| Endre Løvås | Rogaland, Norway | 1 | 1 | 0 | 2019-01-27 |
| Elin Kristoffersen | Innlandet, Norway | 1 | 1 | 0 | 2022-01-30 |
| Odd Rønningen | Vestland, Norway | 1 | 1 | 0 | 2010-05-06 |
| Olav Julsrud | Oslo, Norway | 1 | 1 | 0 | 2013-06-20 |
| Miriam Kartveit Karlsen | Vestland, Norway | 1 | 1 | 0 | 2010-09-14 |
| Dag Berg | Nordland, Norway | 1 | 1 | 1 | 2019-03-22 |
| Eyvind Sandnes | Innlandet, Norway | 1 | 1 | 0 | 2013-05-10 |