Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. |  |
VRS Castricum | 6 | 13 August 1971 | |
| 2. | |
VRS Castricum | 4 | 16 May 1999 | |
| 3. | |
VRS Castricum | 3 | 20 May 1994 | |
| 4. | |
VRS Castricum | 3 | 29 May 1994 | |
| 5. | |
VRS Castricum | 2 | 12 August 1971 | |
| 6. | |
VRS Castricum | 2 | 14 August 1971 | |
| 7. | |
VRS Castricum | 2 | 25 June 1994 | |
| 8. | |
VRS Castricum | 2 | 17 May 1997 | |
| 9. | |
VRS Castricum | 2 | 2 April 1999 | |
| 10. | |
VRS Castricum | 2 | 6 May 2001 | |
| 11. | |
VRS Castricum | 2 | 9 May 2001 | |
| 12. | |
VRS Castricum | 2 | 18 April 2002 | |
| 13. | |
VRS Castricum | 2 | 12 June 2003 | |
| 14. | |
VRS Castricum | 2 | 19 May 2012 | |
| 15. | |
VRS Castricum | 1 | 17 July 1988 | |
| 16. | |
VRS Castricum | 1 | 19 May 1994 | |
| 17. | |
VRS Castricum | 1 | 23 May 1994 | |
| 18. | |
VRS Castricum | 1 | 12 June 1994 | |
| 19. | |
VRS Castricum | 1 | 25 April 1996 | |
| 20. | |
VRS Castricum | 1 | 6 June 1996 | |
| 21. | |
VRS Castricum | 1 | 17 April 1999 | |
| 22. | |
VRS Castricum | 1 | 23 March 2000 | |
| 23. | |
VRS Castricum | 1 | 6 May 2000 | |
| 24. | |
VRS Castricum | 1 | 5 June 2002 | |
| 25. | |
VRS Castricum | 1 | 11 May 2011 | |
