Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2018 | Honnay | 5 October | Honnay | 5 October | |||||
| 2017 | Honnay | 7 September | Honnay | 7 September | |||||
| 2016 | Honnay | 4 October | Honnay | 4 October | |||||
| 2015 | Honnay | 13 September | Honnay | 13 September | |||||
| 2013 | Honnay | 21 September | Honnay | 21 September | |||||
| 2010 | Honnay | 22 August | Honnay | 22 August | |||||
| 2001 | Honnay | 11 August | Honnay | 30 September | |||||
| 1999 | Honnay | 13 August | Honnay | 13 August |
