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| Reporter: | Øyvind Roberg |
| Observers: | Øyvind Roberg |
| Site: | Hengsrudveien 664 () |
| Date: | 2019-04-21 |
| Aktivitet: | Spring phenology |
Funn
| Species: | Willow Warbler (Phylloscopus trochilus) | |
| Comment: | Ankommet | |
| Phenophase: | Arrival | 20.04.2019 |
| Species: | Willow Warbler (Phylloscopus trochilus) | |
| Phenophase: | Birds are singing | 20.04.2019 |