Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. | Parnassia, Kennemerduinen | 8 | 15 May 1988 | ||
| 2. | Parnassia, Kennemerduinen | 6 | 23 May 1988 | ||
| 3. | Parnassia, Kennemerduinen | 5 | 14 May 1988 | ||
| 4. | Parnassia, Kennemerduinen | 3 | 12 May 1988 | ||
| 5. | Parnassia, Kennemerduinen | 2 | 12 April 1988 | ||
| 6. | Parnassia, Kennemerduinen | 1 | 21 May 1988 | ||
| 7. | Parnassia, Kennemerduinen | 1 | 11 May 1989 | ||
| 8. | Parnassia, Kennemerduinen | 1 | 14 May 1989 | ||
| 9. | Parnassia, Kennemerduinen | 1 | 20 May 2002 | ||
