Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Cap Gris-Nez | 30 July | Cap Gris-Nez | 4 August | |||||
| 2021 | Cap Gris-Nez | 20 August | Cap Gris-Nez | 11 October | |||||
| 2020 | Cap Gris-Nez | 12 December | Cap Gris-Nez | 12 December | |||||
| 2018 | Cap Gris-Nez | 10 December | Cap Gris-Nez | 10 December | |||||
| 2017 | Cap Gris-Nez | 7 September | Cap Gris-Nez | 12 November | |||||
| 2016 | Cap Gris-Nez | 26 July | Cap Gris-Nez | 6 November | |||||
| 2015 | Cap Gris-Nez | 16 February | Cap Gris-Nez | 8 November | |||||
| 2014 | Cap Gris-Nez | 24 September | Cap Gris-Nez | 4 December | |||||
| 2013 | Cap Gris-Nez | 22 November | Cap Gris-Nez | 22 November | |||||
| 2011 | Cap Gris-Nez | 20 November | Cap Gris-Nez | 20 November | |||||
| 2010 | Cap Gris-Nez | 15 September | Cap Gris-Nez | 28 October | |||||
| 2008 | Cap Gris-Nez | 11 August | Cap Gris-Nez | 16 November | |||||
| 2007 | Cap Gris-Nez | 19 September | Cap Gris-Nez | 11 November | |||||
| 2006 | Cap Gris-Nez | 7 January | Cap Gris-Nez | 17 December | |||||
| 2005 | Cap Gris-Nez | 25 June | Cap Gris-Nez | 17 December |
