Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Honnay | 7 october | Honnay | 21 october | |||||
| 2018 | Honnay | 11 october | Honnay | 3 november | |||||
| 2017 | Honnay | 11 october | Honnay | 15 october | |||||
| 2016 | Honnay | 30 october | Honnay | 30 october | |||||
| 2015 | Honnay | 10 october | Honnay | 24 october | |||||
| 2008 | Honnay | 18 october | Honnay | 18 october | |||||
| 2007 | Honnay | 6 october | Honnay | 4 november | |||||
| 2001 | Honnay | 7 october | Honnay | 16 october |
