Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. |  |
VRS Castricum | 2 | 6 May 2001 | |
| 2. | |
VRS Castricum | 2 | 9 May 2001 | |
| 3. | |
VRS Castricum | 2 | 18 April 2002 | |
| 4. | |
VRS Castricum | 2 | 12 June 2003 | |
| 5. | |
VRS Castricum | 2 | 19 May 2012 | |
| 6. | |
VRS Castricum | 1 | 23 March 2000 | |
| 7. | |
VRS Castricum | 1 | 6 May 2000 | |
| 8. | |
VRS Castricum | 1 | 5 June 2002 | |
| 9. | |
VRS Castricum | 1 | 11 May 2011 | |
