Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Honnay | 2 September | Honnay | 20 October | |||||
| 2021 | Honnay | 15 August | Honnay | 17 October | |||||
| 2020 | Honnay | 19 August | Honnay | 6 November | |||||
| 2019 | Honnay | 25 August | Honnay | 21 October | |||||
| 2018 | Honnay | 16 August | Honnay | 11 October | |||||
| 2017 | Honnay | 14 August | Honnay | 26 October | |||||
| 2016 | Honnay | 18 September | Honnay | 15 October | |||||
| 2015 | Honnay | 19 September | Honnay | 18 October | |||||
| 2013 | Honnay | 21 September | Honnay | 21 September | |||||
| 2010 | Honnay | 21 August | Honnay | 21 August | |||||
| 2009 | Honnay | 6 September | Honnay | 6 September | |||||
| 2008 | Honnay | 7 September | Honnay | 19 October | |||||
| 2007 | Honnay | 6 October | Honnay | 13 October | |||||
| 2006 | Honnay | 28 October | Honnay | 28 October | |||||
| 2005 | Honnay | 2 September | Honnay | 9 October | |||||
| 2001 | Honnay | 23 August | Honnay | 16 October |
