Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Parnassia, Kennemerduinen | 23 October | Parnassia, Kennemerduinen | 23 October | |||||
| 2018 | Parnassia, Kennemerduinen | 13 October | Parnassia, Kennemerduinen | 13 October | |||||
| 2016 | Parnassia, Kennemerduinen | 14 September | Parnassia, Kennemerduinen | 16 October | |||||
| 2015 | Parnassia, Kennemerduinen | 9 October | Parnassia, Kennemerduinen | 9 October | |||||
| 2014 | Parnassia, Kennemerduinen | 6 October | Parnassia, Kennemerduinen | 6 October | |||||
| 2012 | Parnassia, Kennemerduinen | 19 October | Parnassia, Kennemerduinen | 19 October |
