Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Parnassia, Kennemerduinen | 6 October | Parnassia, Kennemerduinen | 6 October | |||||
| 2016 | Parnassia, Kennemerduinen | 6 May | Parnassia, Kennemerduinen | 23 September | |||||
| 2014 | Parnassia, Kennemerduinen | 20 May | Parnassia, Kennemerduinen | 20 May | |||||
| 2013 | Parnassia, Kennemerduinen | 29 September | Parnassia, Kennemerduinen | 29 September | |||||
| 2011 | Parnassia, Kennemerduinen | 23 April | Parnassia, Kennemerduinen | 23 April |
