Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2018 | Honnay | 27 October | Honnay | 27 October | |||||
| 2015 | Honnay | 10 October | Honnay | 10 October | |||||
| 2014 | Honnay | 26 October | Honnay | 26 October | |||||
| 2013 | Honnay | 16 October | Honnay | 16 October | |||||
| 2011 | Honnay | 1 October | Honnay | 21 October | |||||
| 2010 | Honnay | 23 October | Honnay | 23 October | |||||
| 2007 | Honnay | 6 October | Honnay | 6 October |
