Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. |  |
VRS Castricum | 2 | 18 August 2016 | |
| 2. | |
VRS Castricum | 2 | 23 August 2016 | |
| 3. | |
VRS Castricum | 1 | 12 April 1981 | |
| 4. | |
VRS Castricum | 1 | 17 April 1986 | |
| 5. | |
VRS Castricum | 1 | 24 April 1987 | |
| 6. | |
VRS Castricum | 1 | 7 May 1987 | |
| 7. | |
VRS Castricum | 1 | 3 May 1989 | |
| 8. | |
VRS Castricum | 1 | 3 May 1990 | |
| 9. | |
VRS Castricum | 1 | 8 September 1990 | |
| 10. | |
VRS Castricum | 1 | 11 May 1993 | |
| 11. | |
VRS Castricum | 1 | 20 April 1995 | |
| 12. | |
VRS Castricum | 1 | 16 April 1996 | |
| 13. | |
VRS Castricum | 1 | 25 May 1996 | |
| 14. | |
VRS Castricum | 1 | 14 August 2016 | |
| 15. | |
VRS Castricum | 1 | 21 August 2018 | |
| 16. | |
VRS Castricum | 1 | 27 August 2020 | |
