Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Honnay | 24 August | Honnay | 16 September | |||||
| 2019 | Honnay | 20 August | Honnay | 14 September | |||||
| 2018 | Honnay | 18 August | Honnay | 26 September | |||||
| 2017 | Honnay | 27 August | Honnay | 16 September | |||||
| 2013 | Honnay | 27 August | Honnay | 27 August | |||||
| 2012 | Honnay | 23 September | Honnay | 23 September | |||||
| 2010 | Honnay | 25 September | Honnay | 25 September | |||||
| 2009 | Honnay | 6 September | Honnay | 6 September | |||||
| 2007 | Honnay | 7 September | Honnay | 28 September | |||||
| 2005 | Honnay | 30 August | Honnay | 30 August | |||||
| 2001 | Honnay | 17 September | Honnay | 17 September |
