Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 1985 | Parnassia, Kennemerduinen | 20 October | Parnassia, Kennemerduinen | 23 October | |||||
| 1968 | Parnassia, Kennemerduinen | 19 October | Parnassia, Kennemerduinen | 19 October | |||||
| 1955 | Parnassia, Kennemerduinen | 12 October | Parnassia, Kennemerduinen | 12 October |
