Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Honnay | 6 August | Honnay | 27 August | |||||
| 2021 | Honnay | 7 September | Honnay | 9 October | |||||
| 2020 | Honnay | 24 August | Honnay | 1 September | |||||
| 2019 | Honnay | 14 August | Honnay | 16 August | |||||
| 2018 | Honnay | 18 August | Honnay | 2 September | |||||
| 2017 | Honnay | 28 August | Honnay | 2 September | |||||
| 2013 | Honnay | 21 September | Honnay | 21 September | |||||
| 2012 | Honnay | 29 August | Honnay | 29 August | |||||
| 2007 | Honnay | 14 October | Honnay | 14 October |
