Betula pubescens (Downy Birch)
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| Alvøen skole | Vestland, Norway | 81 | 1 | 5 | 2021-05-20 |
| Meteorologisk institutt | Oslo, Norway | 68 | 1 | 0 | 2006-06-20 |
| Bioforsk Midt-Norge | Trøndelag, Norway | 48 | 1 | 0 | 2006-12-06 |
| Vestre Jakobselv skole | Finnmark, Norway | 47 | 1 | 5 | 2023-10-25 |
| Alta ungdomsskole | Finnmark, Norway | 44 | 1 | 4 | 2024-05-27 |
| Kalvatræet skole | Vestland, Norway | 43 | 1 | 0 | 2010-05-19 |
| Alta oppvekstkontor | Finnmark, Norway | 40 | 1 | 0 | 2015-05-31 |
| Unni R. Bjerke Gamst | Troms, Norway | 39 | 1 | 0 | 2012-06-19 |
| Rune Nilsen | Agder, Norway | 37 | 1 | 1 | 2024-05-07 |
| Uregistrert vårsjekker | Vestland, Norway | 36 | 1 | 0 | 2008-08-26 |
| Haukås skole | Vestland, Norway | 29 | 1 | 0 | 2022-05-05 |
| Haugaland landbruksrådgjeving | Vestland, Norway | 27 | 1 | 0 | 2024-04-28 |
| Guri L. Ravatn | Rogaland, Norway | 25 | 1 | 0 | 2007-05-20 |
| Fjelltun skole | Rogaland, Norway | 25 | 1 | 0 | 2022-09-09 |
| Ingar Granholt | Vestfold, Norway | 25 | 1 | 8 | 2024-04-20 |
| Stryn vidaregåande skule | Vestland, Norway | 24 | 2 | 3 | 2022-09-02 |
| Korsfjord Oppvekstsenter/Avdeling skole | Finnmark, Norway | 22 | 1 | 0 | 2007-12-14 |
| Pasvik skole | Finnmark, Norway | 21 | 1 | 0 | 2013-09-11 |
| Kirkenes ungdomsskole | Finnmark, Norway | 21 | 1 | 0 | 2021-09-09 |
| Tove Hamre | Innlandet, Norway | 20 | 1 | 0 | 2019-04-24 |
| Re videregående skole | Vestfold, Norway | 19 | 1 | 0 | 2022-09-09 |
| Marit Hansen | Trøndelag, Norway | 19 | 1 | 0 | 2024-04-27 |
| Gunvor Hustoft | Rogaland, Norway | 18 | 1 | 0 | 2024-04-11 |
| Lund ungdomsskole | Rogaland, Norway | 18 | 1 | 0 | 2023-05-14 |
| Ranvik ungdomsskole | Vestfold, Norway | 18 | 1 | 0 | 2015-05-26 |
| Bratsbergkleiva skole | Telemark, Norway | 16 | 1 | 0 | 2020-04-03 |
| Byrknes skule | Vestland, Norway | 16 | 1 | 0 | 2024-04-14 |
| Storetveit skole | Vestland, Norway | 15 | 1 | 0 | 2018-04-12 |
| Kaland barne- og ungdomsskule | Vestland, Norway | 15 | 1 | 0 | 2018-05-11 |
| Gunnar Hamre | Vestland, Norway | 14 | 1 | 0 | 2024-04-10 |
| Charlotte Bakke | Telemark, Norway | 14 | 1 | 0 | 2021-04-28 |
| Åsmund Berg | Innlandet, Norway | 13 | 1 | 1 | 2024-05-03 |
| Flaktveit skole | Vestland, Norway | 13 | 1 | 1 | 2020-04-23 |
| Asak skole | Akershus, Norway | 13 | 1 | 0 | 2012-05-08 |
| Jørpeland ungdomsskole | Rogaland, Norway | 13 | 1 | 12 | 2022-04-26 |
| Tau ungdomsskole | Rogaland, Norway | 13 | 1 | 1 | 2022-09-02 |
| Stein-Rune Karlsen | Troms, Norway | 13 | 1 | 0 | 2005-10-27 |
| Frans-Emil Wielgolaski | Oslo, Norway | 13 | 1 | 0 | 2012-03-01 |
| Borgen ungdomsskole | Akershus, Norway | 13 | 1 | 1 | 2022-09-21 |
| Nils Battin | Agder, Norway | 13 | 1 | 0 | 2024-05-07 |
| Bioforsk Svanhovd | Finnmark, Norway | 12 | 1 | 0 | 2016-05-18 |
| Frode Øen | Buskerud, Norway | 12 | 1 | 0 | 2019-04-24 |
| Li skole | Akershus, Norway | 12 | 1 | 0 | 2014-06-18 |
| Skolelaboratoriet i realfag, UiB | Vestland, Norway | 12 | 1 | 0 | 2012-09-12 |
| Nygård skole | Vestland, Norway | 10 | 1 | 2 | 2008-04-25 |
| Tylldalen skole | Innlandet, Norway | 10 | 1 | 4 | 2020-05-25 |
| Arstad skole | Innlandet, Norway | 10 | 1 | 4 | 2022-09-22 |
| Jannik Hytten | Vestfold, Norway | 10 | 1 | 0 | 2009-11-17 |
| Grethe Nicolaysen | Nordland, Norway | 10 | 1 | 0 | 2024-05-16 |
| Ottar Sætre | Møre og Romsdal, Norway | 10 | 1 | 0 | 2024-04-16 |