Genus: Trollheggslekta (Frangula)
| Site | Municipality (county) | Num. obs. | Num. species | Num. images | Last obs. | |
|---|---|---|---|---|---|---|
| Bakketun | Innlandet, Norway | 13 | 1 | 0 | 2019-05-22 | |
| Elgvegen 10 | Rogaland, Norway | 1 | 1 | 0 | 2022-09-09 | |
| Estenstadmarka | Trøndelag, Norway | 1 | 1 | 0 | 2013-06-07 | |
| Hustoft gnr. 150/4 | Rogaland, Norway | 26 | 1 | 1 | 2024-05-25 | |
| Nes Verk rundt | Agder, Norway | 2 | 1 | 0 | 2023-05-31 | |
| Nisterud tjern | Telemark, Norway | 1 | 1 | 0 | 2005-09-19 | |
| Nordstrand bad | Oslo, Norway | 2 | 2 | 2 | 2015-06-04 |