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| Rapportør: | Margret Andersen |
| Observatører: | Margret Andersen |
| Site: | Slemmestad () |
| Date: | 2021-04-26 |
| Aktivitet: | Spring phenology |
Funn
| Art: | Barnacle Goose (Branta leucopsis) | |
| Phenophase: | Arrival | 20.04.2021 |
| Art: | White Wagtail (Motacilla alba) | |
| Phenophase: | Arrival | 19.04.2021 |
