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| Species | Phenological stage | 2019 | 2020 |
|---|---|---|---|
| Common Crane | Arrival | 17.04 | |
| Common Crane | Birds are singing | 17.04 | |
| Whooper Swan | Arrival | 19.04 | |
| Whooper Swan | Birds are singing | 19.04 |
| Species | Phenological stage | 2019 | 2020 |
|---|---|---|---|
| Common Crane | Arrival | 17.04 | |
| Common Crane | Birds are singing | 17.04 | |
| Whooper Swan | Arrival | 19.04 | |
| Whooper Swan | Birds are singing | 19.04 |