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| Species | Phenological stage | 2018 | 2020 |
|---|---|---|---|
| Svane | Arrival | 27.01 | |
| Svane | Birds are singing | 27.01 | |
| Whooper Swan | Arrival | 08.03 | |
| Whooper Swan | Birds are singing | 08.03 |
| Species | Phenological stage | 2018 | 2020 |
|---|---|---|---|
| Svane | Arrival | 27.01 | |
| Svane | Birds are singing | 27.01 | |
| Whooper Swan | Arrival | 08.03 | |
| Whooper Swan | Birds are singing | 08.03 |