Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Honnay | 28 august | Honnay | 28 august | |||||
| 2018 | Honnay | 30 august | Honnay | 26 september | |||||
| 2017 | Honnay | 31 august | Honnay | 31 august | |||||
| 2016 | Honnay | 29 august | Honnay | 6 september | |||||
| 2007 | Honnay | 1 september | Honnay | 4 september | |||||
| 2001 | Honnay | 25 august | Honnay | 2 september |
