Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Honnay | 27 August | Honnay | 27 August | |||||
| 2019 | Honnay | 11 September | Honnay | 11 September | |||||
| 2017 | Honnay | 9 September | Honnay | 9 September | |||||
| 2008 | Honnay | 31 August | Honnay | 31 August | |||||
| 2001 | Honnay | 7 August | Honnay | 16 August |
