Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2018 | Parnassia, Kennemerduinen | 1 September | Parnassia, Kennemerduinen | 1 September | |||||
| 2009 | Parnassia, Kennemerduinen | 18 April | Parnassia, Kennemerduinen | 18 April | |||||
| 2008 | Parnassia, Kennemerduinen | 30 August | Parnassia, Kennemerduinen | 22 September | |||||
| 2000 | Parnassia, Kennemerduinen | 30 August | Parnassia, Kennemerduinen | 30 August | |||||
| 1995 | Parnassia, Kennemerduinen | 13 September | Parnassia, Kennemerduinen | 17 September | |||||
| 1991 | Parnassia, Kennemerduinen | 22 August | Parnassia, Kennemerduinen | 22 August |
