Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Honnay | 17 august | Honnay | 3 november | |||||
| 2019 | Honnay | 16 august | Honnay | 25 october | |||||
| 2018 | Honnay | 16 august | Honnay | 26 october | |||||
| 2017 | Honnay | 14 august | Honnay | 18 october | |||||
| 2016 | Honnay | 22 september | Honnay | 9 october | |||||
| 2015 | Honnay | 23 august | Honnay | 24 october | |||||
| 2014 | Honnay | 24 august | Honnay | 26 october | |||||
| 2013 | Honnay | 24 august | Honnay | 26 october | |||||
| 2012 | Honnay | 29 august | Honnay | 1 october | |||||
| 2009 | Honnay | 12 september | Honnay | 14 october |
