Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Honnay | 1 October | Honnay | 25 October | |||||
| 2020 | Honnay | 14 October | Honnay | 30 October | |||||
| 2019 | Honnay | 3 September | Honnay | 18 September | |||||
| 2018 | Honnay | 28 August | Honnay | 28 August | |||||
| 2015 | Honnay | 23 August | Honnay | 23 August |
