Frangula alnus (Alder Buckthorn)
| Participant | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. |
|---|---|---|---|---|---|
| Gunvor Hustoft | Rogaland, Norway | 26 | 1 | 1 | 2024-05-25 |
| Tove Hamre | Innlandet, Norway | 13 | 1 | 0 | 2019-05-22 |
| Nils Battin | Agder, Norway | 2 | 1 | 0 | 2023-05-31 |
| Nordstrand skole | Oslo, Norway | 1 | 1 | 1 | 2015-06-04 |
| Fjelltun skole | Rogaland, Norway | 1 | 1 | 0 | 2022-09-09 |
| Blussuvoll skole | Trøndelag, Norway | 1 | 1 | 0 | 2013-06-07 |
| Skien videregående skole/Avd Brekkeby | Telemark, Norway | 1 | 1 | 0 | 2005-09-19 |