Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Honnay | 13 October | Honnay | 13 November | |||||
| 2018 | Honnay | 2 November | Honnay | 2 November | |||||
| 2016 | Honnay | 2 October | Honnay | 30 October | |||||
| 2015 | Honnay | 18 October | Honnay | 1 November | |||||
| 2014 | Honnay | 26 October | Honnay | 26 October |
