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 |
