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| Rapportør: | Bjørn Kristoffersen |
| Observatører: | bjørn kristoffersen |
| Site: | Bybrua () |
| Date: | 2021-04-01 |
| Aktivitet: | Spring phenology |
Funn
| Art: | Wood Pigeon (Columba palumbus) | |
| Phenophase: | Arrival | 30.03.2021 |
| Art: | Wood Pigeon (Columba palumbus) | |
| Phenophase: | Birds are singing | 30.03.2021 |