Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. | Parnassia, Kennemerduinen | 1 | 28 April 2009 | ||
| 2. | Parnassia, Kennemerduinen | 1 | 29 April 2012 | ||
| 3. | Parnassia, Kennemerduinen | 1 | 28 May 2013 | ||
| 4. | Parnassia, Kennemerduinen | 1 | 27 September 2013 | ||
| 5. | Parnassia, Kennemerduinen | 1 | 28 April 2014 | ||
| 6. | Parnassia, Kennemerduinen | 1 | 20 May 2014 | ||
| 7. | Parnassia, Kennemerduinen | 1 | 20 April 2019 | ||
