Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Honnay | 6 October | Honnay | 27 October | |||||
| 2019 | Honnay | 7 October | Honnay | 21 October | |||||
| 2018 | Honnay | 11 October | Honnay | 3 November | |||||
| 2017 | Honnay | 11 October | Honnay | 15 October | |||||
| 2016 | Honnay | 30 October | Honnay | 30 October | |||||
| 2015 | Honnay | 10 October | Honnay | 24 October | |||||
| 2008 | Honnay | 18 October | Honnay | 18 October | |||||
| 2007 | Honnay | 6 October | Honnay | 4 November | |||||
| 2001 | Honnay | 7 October | Honnay | 16 October |
