Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Gebrande Kamp, Middelaar | 2 August | Gebrande Kamp, Middelaar | 2 November | |||||
| 2020 | Gebrande Kamp, Middelaar | 7 April | Gebrande Kamp, Middelaar | 9 November | |||||
| 2019 | Gebrande Kamp, Middelaar | 31 August | Gebrande Kamp, Middelaar | 26 October | |||||
| 2018 | Gebrande Kamp, Middelaar | 12 September | Gebrande Kamp, Middelaar | 12 September | |||||
| 2009 | Gebrande Kamp, Middelaar | 11 September | Gebrande Kamp, Middelaar | 11 September | |||||
| 2007 | Gebrande Kamp, Middelaar | 13 September | Gebrande Kamp, Middelaar | 13 September | |||||
| 2004 | Gebrande Kamp, Middelaar | 18 March | Gebrande Kamp, Middelaar | 18 April |
