Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Honnay | 15 September | Honnay | 21 October | |||||
| 2019 | Honnay | 11 September | Honnay | 30 October | |||||
| 2018 | Honnay | 11 October | Honnay | 14 November | |||||
| 2017 | Honnay | 9 October | Honnay | 31 October | |||||
| 2016 | Honnay | 26 August | Honnay | 15 October | |||||
| 2015 | Honnay | 10 October | Honnay | 10 October | |||||
| 2013 | Honnay | 16 October | Honnay | 16 October | |||||
| 2009 | Honnay | 12 September | Honnay | 26 September | |||||
| 2008 | Honnay | 21 September | Honnay | 11 October | |||||
| 2007 | Honnay | 6 October | Honnay | 18 November | |||||
| 2006 | Honnay | 30 August | Honnay | 29 October | |||||
| 2005 | Honnay | 2 September | Honnay | 2 September | |||||
| 2002 | Honnay | 6 October | Honnay | 6 October | |||||
| 2001 | Honnay | 9 September | Honnay | 14 October |
