Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Honnay | 4 September | Honnay | 4 September | |||||
| 2018 | Honnay | 23 August | Honnay | 26 August | |||||
| 2017 | Honnay | 1 September | Honnay | 1 September | |||||
| 2016 | Honnay | 25 August | Honnay | 27 August | |||||
| 2001 | Honnay | 22 August | Honnay | 24 August |
