Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Honnay | 20 august | Honnay | 14 september | |||||
| 2018 | Honnay | 18 august | Honnay | 26 september | |||||
| 2017 | Honnay | 27 august | Honnay | 16 september | |||||
| 2013 | Honnay | 27 august | Honnay | 27 august | |||||
| 2012 | Honnay | 23 september | Honnay | 23 september | |||||
| 2010 | Honnay | 25 september | Honnay | 25 september | |||||
| 2009 | Honnay | 6 september | Honnay | 6 september | |||||
| 2007 | Honnay | 7 september | Honnay | 28 september | |||||
| 2005 | Honnay | 30 august | Honnay | 30 august | |||||
| 2001 | Honnay | 17 september | Honnay | 17 september |
