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| Rapportør: | Bent Christian Øhren |
| Observatører: | Bent Christian Øhren |
| Site: | Brevik () |
| Date: | 2020-05-03 |
| Aktivitet: | Spring phenology |
Funn
| Art: | House Martin (Delichon urbicum) | |
| Phenophase: | Arrival | 01.05.2020 |
| Art: | House Martin (Delichon urbicum) | |
| Phenophase: | Birds are singing | 01.05.2020 |