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| Rapportør: | Per Torgersen |
| Observatører: | Per Torgersen |
| Site: | Bjørkelangen () |
| Date: | 2023-04-01 |
| Aktivitet: | Spring phenology |
Funn
| Art: | Fieldfare (Turdus pilaris) | |
| Phenophase: | Arrival | 30.01.2023 |
| Art: | Fieldfare (Turdus pilaris) | |
| Phenophase: | Birds are singing | 17.03.2023 |
| Art: | Tawny Owl (Strix aluco) | |
| Phenophase: | Arrival | 31.03.2023 |
| Art: | Tawny Owl (Strix aluco) | |
| Phenophase: | Birds are singing | 31.03.2023 |
| Art: | Wood Pigeon (Columba palumbus) | |
| Phenophase: | Arrival | 01.04.2023 |
| Art: | Wood Pigeon (Columba palumbus) | |
| Phenophase: | Birds are singing | 01.04.2023 |