Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Parnassia, Kennemerduinen | 21 April | Parnassia, Kennemerduinen | 21 April | |||||
| 2014 | Parnassia, Kennemerduinen | 31 March | Parnassia, Kennemerduinen | 18 October | |||||
| 2011 | Parnassia, Kennemerduinen | 29 September | Parnassia, Kennemerduinen | 2 October |
