Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Graaf Visart (Brugge) | 13 February | Graaf Visart (Brugge) | 13 February | |||||
| 2020 | Graaf Visart (Brugge) | 2 April | Graaf Visart (Brugge) | 14 October | |||||
| 2019 | Graaf Visart (Brugge) | 30 October | Graaf Visart (Brugge) | 30 October | |||||
| 2018 | Graaf Visart (Brugge) | 26 March | Graaf Visart (Brugge) | 26 March | |||||
| 2017 | Graaf Visart (Brugge) | 16 October | Graaf Visart (Brugge) | 16 October | |||||
| 2016 | Graaf Visart (Brugge) | 18 September | Graaf Visart (Brugge) | 21 October | |||||
| 2015 | Graaf Visart (Brugge) | 30 September | Graaf Visart (Brugge) | 30 September | |||||
| 2014 | Graaf Visart (Brugge) | 31 March | Graaf Visart (Brugge) | 8 October | |||||
| 2013 | Graaf Visart (Brugge) | 19 January | Graaf Visart (Brugge) | 16 October | |||||
| 2012 | Graaf Visart (Brugge) | 4 February | Graaf Visart (Brugge) | 28 November | |||||
| 2010 | Graaf Visart (Brugge) | 11 February | Graaf Visart (Brugge) | 24 December |
