Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Honnay | 18 September | Honnay | 2 November | |||||
| 2019 | Honnay | 12 October | Honnay | 8 November | |||||
| 2018 | Honnay | 31 October | Honnay | 7 November | |||||
| 2015 | Honnay | 23 August | Honnay | 23 August | |||||
| 2011 | Honnay | 16 October | Honnay | 16 October |
