Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Honnay | 19 October | Honnay | 19 October | |||||
| 2021 | Honnay | 30 August | Honnay | 30 August | |||||
| 2020 | Honnay | 14 August | Honnay | 4 September | |||||
| 2018 | Honnay | 18 August | Honnay | 26 August | |||||
| 2001 | Honnay | 30 August | Honnay | 30 August |
