Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Honnay | 16 October | Honnay | 16 October | |||||
| 2018 | Honnay | 22 September | Honnay | 4 October | |||||
| 2016 | Honnay | 16 October | Honnay | 16 October | |||||
| 2011 | Honnay | 15 October | Honnay | 15 October | |||||
| 2001 | Honnay | 30 September | Honnay | 3 October |
