Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. | Parnassia, Kennemerduinen | 2 | 22 September 1957 | ||
| 2. | Parnassia, Kennemerduinen | 1 | 25 September 1956 | ||
| 3. | Parnassia, Kennemerduinen | 1 | 4 October 1962 | ||
| 4. | Parnassia, Kennemerduinen | 1 | 10 September 1982 | ||
| 5. | Parnassia, Kennemerduinen | 1 | 9 September 1989 | ||
| 6. | Parnassia, Kennemerduinen | 1 | 6 September 1992 | ||
| 7. | Parnassia, Kennemerduinen | 1 | 19 August 1993 | ||
