Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 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 |
