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| Rapportør: | Frøydis Mathiesen |
| Observatører: | Frøydis Mathiesen |
| Site: | Konnerud () |
| Date: | 2021-05-21 |
| Aktivitet: | Spring phenology |
Funn
| Art: | Barn Swallow (Hirundo rustica) | |
| Phenophase: | Arrival | 16.05.2021 |
| Art: | Barn Swallow (Hirundo rustica) | |
| Phenophase: | Birds are singing | 16.05.2021 |