Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Honnay | 28 august | Honnay | 24 september | |||||
| 2018 | Honnay | 16 august | Honnay | 30 september | |||||
| 2017 | Honnay | 4 august | Honnay | 22 september | |||||
| 2016 | Honnay | 26 august | Honnay | 22 september | |||||
| 2014 | Honnay | 24 august | Honnay | 20 september | |||||
| 2013 | Honnay | 24 august | Honnay | 26 october | |||||
| 2011 | Honnay | 15 august | Honnay | 6 september | |||||
| 2010 | Honnay | 21 august | Honnay | 3 october | |||||
| 2009 | Honnay | 12 september | Honnay | 22 september | |||||
| 2008 | Honnay | 24 august | Honnay | 20 september | |||||
| 2007 | Honnay | 1 september | Honnay | 29 september | |||||
| 2006 | Honnay | 29 august | Honnay | 24 september | |||||
| 2005 | Honnay | 29 august | Honnay | 2 october | |||||
| 2001 | Honnay | 13 august | Honnay | 14 october | |||||
| 1997 | Honnay | 28 august | Honnay | 6 september |
