Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. | Parnassia, Kennemerduinen | 2 | 23 April 2011 | ||
| 2. | Parnassia, Kennemerduinen | 1 | 29 September 2013 | ||
| 3. | Parnassia, Kennemerduinen | 1 | 20 May 2014 | ||
| 4. | Parnassia, Kennemerduinen | 1 | 6 May 2016 | ||
| 5. | Parnassia, Kennemerduinen | 1 | 23 September 2016 | ||
| 6. | Parnassia, Kennemerduinen | 1 | 6 October 2019 | ||
