Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | De Horde (Lopik) | 26 August | De Horde (Lopik) | 26 August | |||||
| 2020 | De Horde (Lopik) | 1 April | De Horde (Lopik) | 1 April | |||||
| 2012 | De Horde (Lopik) | 23 October | De Horde (Lopik) | 23 October | |||||
| 2009 | De Horde (Lopik) | 25 April | De Horde (Lopik) | 25 April |
