Record counts
| # | Migration site | Totals | Date | ||
|---|---|---|---|---|---|
| 1. | Winter Hill, Bolton (Gtr Manc/Lancs, England) | 21 | 14 October 2019 | ||
| 2. | Winter Hill, Bolton (Gtr Manc/Lancs, England) | 3 | 21 October 2012 | ||
| 3. | Winter Hill, Bolton (Gtr Manc/Lancs, England) | 2 | 17 September 2012 | ||
| 4. | Winter Hill, Bolton (Gtr Manc/Lancs, England) | 2 | 6 October 2012 | ||
| 5. | Winter Hill, Bolton (Gtr Manc/Lancs, England) | 2 | 7 October 2012 | ||
| 6. | Winter Hill, Bolton (Gtr Manc/Lancs, England) | 2 | 14 October 2012 | ||
| 7. | Winter Hill, Bolton (Gtr Manc/Lancs, England) | 1 | 4 November 2013 | ||
