Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | De Horde (Lopik) | 15 february | De Horde (Lopik) | 20 october | |||||
| 2019 | De Horde (Lopik) | 20 january | De Horde (Lopik) | 27 december | |||||
| 2018 | De Horde (Lopik) | 27 july | De Horde (Lopik) | 23 december | |||||
| 2017 | De Horde (Lopik) | 27 june | De Horde (Lopik) | 27 june | |||||
| 2016 | De Horde (Lopik) | 15 march | De Horde (Lopik) | 15 march | |||||
| 2015 | De Horde (Lopik) | 6 april | De Horde (Lopik) | 4 may | |||||
| 2014 | De Horde (Lopik) | 28 april | De Horde (Lopik) | 28 april | |||||
| 2008 | De Horde (Lopik) | 5 march | De Horde (Lopik) | 5 march |
