Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Graaf Visart (Brugge) | 19 april | Graaf Visart (Brugge) | 20 april | |||||
| 2014 | Graaf Visart (Brugge) | 21 april | Graaf Visart (Brugge) | 19 october | |||||
| 2012 | Graaf Visart (Brugge) | 14 october | Graaf Visart (Brugge) | 14 october | |||||
| 2011 | Graaf Visart (Brugge) | 10 april | Graaf Visart (Brugge) | 10 april | |||||
| 2007 | Graaf Visart (Brugge) | 1 may | Graaf Visart (Brugge) | 1 may |
