Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Honnay | 19 August | Honnay | 1 September | |||||
| 2019 | Honnay | 29 August | Honnay | 29 August | |||||
| 2017 | Honnay | 9 August | Honnay | 17 September | |||||
| 2001 | Honnay | 6 August | Honnay | 26 August | |||||
| 1999 | Honnay | 13 August | Honnay | 14 August |
