Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2018 | Parnassia, Kennemerduinen | 4 November | Parnassia, Kennemerduinen | 4 November | |||||
| 2016 | Parnassia, Kennemerduinen | 26 October | Parnassia, Kennemerduinen | 26 October | |||||
| 2012 | Parnassia, Kennemerduinen | 23 September | Parnassia, Kennemerduinen | 23 September |
