Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2018 | Honnay | 18 August | Honnay | 18 August | |||||
| 2010 | Honnay | 25 September | Honnay | 25 September | |||||
| 2009 | Honnay | 12 September | Honnay | 12 September | |||||
| 2008 | Honnay | 7 September | Honnay | 20 September | |||||
| 2007 | Honnay | 7 September | Honnay | 23 September | |||||
| 2006 | Honnay | 30 August | Honnay | 30 August |
