Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Honnay | 7 October | Honnay | 5 November | |||||
| 2020 | Honnay | 7 October | Honnay | 12 November | |||||
| 2018 | Honnay | 21 October | Honnay | 18 November | |||||
| 2017 | Honnay | 28 October | Honnay | 5 November | |||||
| 2016 | Honnay | 16 October | Honnay | 16 October | |||||
| 2014 | Honnay | 26 October | Honnay | 26 October | |||||
| 2011 | Honnay | 22 October | Honnay | 22 October | |||||
| 2008 | Honnay | 19 October | Honnay | 19 October | |||||
| 2001 | Honnay | 3 October | Honnay | 5 October |
