Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | De Horde (Lopik) | 9 September | De Horde (Lopik) | 9 September | |||||
| 2018 | De Horde (Lopik) | 13 May | De Horde (Lopik) | 4 August | |||||
| 2016 | De Horde (Lopik) | 31 July | De Horde (Lopik) | 31 July | |||||
| 2015 | De Horde (Lopik) | 10 September | De Horde (Lopik) | 10 September | |||||
| 2014 | De Horde (Lopik) | 6 May | De Horde (Lopik) | 29 August | |||||
| 2012 | De Horde (Lopik) | 16 April | De Horde (Lopik) | 16 April | |||||
| 2010 | De Horde (Lopik) | 3 July | De Horde (Lopik) | 3 July | |||||
| 2009 | De Horde (Lopik) | 27 July | De Horde (Lopik) | 27 July |
