Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. | Parnassia, Kennemerduinen | 1 | 27 September 2013 | ||
| 2. | Parnassia, Kennemerduinen | 1 | 29 September 2014 | ||
| 3. | Parnassia, Kennemerduinen | 1 | 15 September 2016 | ||
| 4. | Parnassia, Kennemerduinen | 1 | 6 October 2018 | ||
| 5. | Parnassia, Kennemerduinen | 1 | 26 September 2020 | ||
