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| Rapportør: | Per Torgersen |
| Observatører: | Per Torgersen |
| Site: | Bjørkelangen () |
| Date: | 2023-04-10 |
| Aktivitet: | Spring phenology |
Funn
| Art: | Northern Goshawk (Accipiter gentilis) | |
| Phenophase: | Arrival | 09.04.2023 |
| Art: | Canada Goose (Branta canadensis) | |
| Phenophase: | Arrival | 10.04.2023 |
| Art: | Canada Goose (Branta canadensis) | |
| Merknad: | Parring på isen | |
| Phenophase: | Birds are singing | 10.04.2023 |
| Art: | Song Thrush (Turdus philomelos) | |
| Phenophase: | Arrival | 10.04.2023 |
| Art: | Song Thrush (Turdus philomelos) | |
| Phenophase: | Birds are singing | 10.04.2023 |
| Art: | Robin (Erithacus rubecula) | |
| Phenophase: | Arrival | 06.04.2023 |
| Art: | Common Blackbird (Turdus merula) | |
| Phenophase: | Birds are singing | 08.04.2023 |
| Art: | Camberwell Beauty (Nymphalis antiopa) | |
| Phenophase: | Adult | 08.04.2023 |