Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. | Parnassia, Kennemerduinen | 2 | 30 August 2008 | ||
| 2. | Parnassia, Kennemerduinen | 1 | 22 August 1991 | ||
| 3. | Parnassia, Kennemerduinen | 1 | 13 September 1995 | ||
| 4. | Parnassia, Kennemerduinen | 1 | 15 September 1995 | ||
| 5. | Parnassia, Kennemerduinen | 1 | 17 September 1995 | ||
| 6. | Parnassia, Kennemerduinen | 1 | 30 August 2000 | ||
| 7. | Parnassia, Kennemerduinen | 1 | 22 September 2008 | ||
| 8. | Parnassia, Kennemerduinen | 1 | 18 April 2009 | ||
| 9. | Parnassia, Kennemerduinen | 1 | 1 September 2018 | ||
