Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Honnay | 23 October | Honnay | 23 October | |||||
| 2016 | Honnay | 30 October | Honnay | 30 October | |||||
| 2012 | Honnay | 29 August | Honnay | 30 August | |||||
| 2011 | Honnay | 15 October | Honnay | 16 October | |||||
| 2008 | Honnay | 25 October | Honnay | 25 October | |||||
| 2007 | Honnay | 14 October | Honnay | 14 October |
