Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2016 | Honnay | 30 October | Honnay | 30 October | |||||
| 2015 | Honnay | 10 October | Honnay | 1 November | |||||
| 2014 | Honnay | 26 October | Honnay | 26 October | |||||
| 2013 | Honnay | 24 August | Honnay | 31 October | |||||
| 2012 | Honnay | 1 October | Honnay | 1 October | |||||
| 2011 | Honnay | 6 September | Honnay | 6 September | |||||
| 2010 | Honnay | 12 October | Honnay | 12 October |
