Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Parnassia, Kennemerduinen | 4 October | Parnassia, Kennemerduinen | 4 October | |||||
| 2008 | Parnassia, Kennemerduinen | 8 November | Parnassia, Kennemerduinen | 8 November | |||||
| 2007 | Parnassia, Kennemerduinen | 13 October | Parnassia, Kennemerduinen | 13 October | |||||
| 1985 | Parnassia, Kennemerduinen | 6 October | Parnassia, Kennemerduinen | 16 November | |||||
| 1984 | Parnassia, Kennemerduinen | 6 October | Parnassia, Kennemerduinen | 27 November | |||||
| 1983 | Parnassia, Kennemerduinen | 15 August | Parnassia, Kennemerduinen | 13 November |
