Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | De Horde (Lopik) | 16 October | De Horde (Lopik) | 23 October | |||||
| 2020 | De Horde (Lopik) | 9 October | De Horde (Lopik) | 23 October | |||||
| 2019 | De Horde (Lopik) | 6 January | De Horde (Lopik) | 28 October | |||||
| 2018 | De Horde (Lopik) | 3 November | De Horde (Lopik) | 3 November | |||||
| 2017 | De Horde (Lopik) | 30 September | De Horde (Lopik) | 30 September | |||||
| 2016 | De Horde (Lopik) | 1 October | De Horde (Lopik) | 5 November | |||||
| 2015 | De Horde (Lopik) | 3 October | De Horde (Lopik) | 21 October | |||||
| 2014 | De Horde (Lopik) | 4 October | De Horde (Lopik) | 31 October | |||||
| 2013 | De Horde (Lopik) | 21 October | De Horde (Lopik) | 21 October | |||||
| 2003 | De Horde (Lopik) | 7 November | De Horde (Lopik) | 7 November |
