Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Gebrande Kamp, Middelaar | 2 August | Gebrande Kamp, Middelaar | 31 August | |||||
| 2020 | Gebrande Kamp, Middelaar | 7 April | Gebrande Kamp, Middelaar | 8 October | |||||
| 2019 | Gebrande Kamp, Middelaar | 20 April | Gebrande Kamp, Middelaar | 23 October | |||||
| 2018 | Gebrande Kamp, Middelaar | 17 August | Gebrande Kamp, Middelaar | 23 September | |||||
| 2009 | Gebrande Kamp, Middelaar | 9 October | Gebrande Kamp, Middelaar | 9 October | |||||
| 2008 | Gebrande Kamp, Middelaar | 27 February | Gebrande Kamp, Middelaar | 17 October | |||||
| 2007 | Gebrande Kamp, Middelaar | 11 August | Gebrande Kamp, Middelaar | 6 November | |||||
| 2004 | Gebrande Kamp, Middelaar | 17 March | Gebrande Kamp, Middelaar | 1 May |
