Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. | Parnassia, Kennemerduinen | 3 | 22 October 2008 | ||
| 2. | Parnassia, Kennemerduinen | 1 | 9 October 2010 | ||
| 3. | Parnassia, Kennemerduinen | 1 | 12 October 2010 | ||
| 4. | Parnassia, Kennemerduinen | 1 | 30 October 2014 | ||
| 5. | Parnassia, Kennemerduinen | 1 | 4 October 2016 | ||
