Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. |  |
VRS Castricum | 3 | 31 March 2001 | |
| 2. | |
VRS Castricum | 2 | 1 April 2005 | |
| 3. | |
VRS Castricum | 2 | 23 March 2011 | |
| 4. | |
VRS Castricum | 2 | 27 March 2011 | |
| 5. | |
VRS Castricum | 1 | 30 March 2001 | |
| 6. | |
VRS Castricum | 1 | 25 March 2002 | |
| 7. | |
VRS Castricum | 1 | 5 April 2002 | |
| 8. | |
VRS Castricum | 1 | 26 March 2004 | |
| 9. | |
VRS Castricum | 1 | 14 April 2006 | |
| 10. | |
VRS Castricum | 1 | 24 March 2010 | |
| 11. | |
VRS Castricum | 1 | 18 March 2011 | |
| 12. | |
VRS Castricum | 1 | 11 March 2012 | |
| 13. | |
VRS Castricum | 1 | 20 March 2012 | |
| 14. | |
VRS Castricum | 1 | 23 March 2012 | |
| 15. | |
VRS Castricum | 1 | 14 April 2013 | |
| 16. | |
VRS Castricum | 1 | 1 April 2014 | |
| 17. | |
VRS Castricum | 1 | 24 March 2017 | |
