Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Cap Gris-Nez | 19 October | Cap Gris-Nez | 18 December | |||||
| 2021 | Cap Gris-Nez | 7 October | Cap Gris-Nez | 28 October | |||||
| 2020 | Cap Gris-Nez | 14 October | Cap Gris-Nez | 14 October | |||||
| 2016 | Cap Gris-Nez | 13 March | Cap Gris-Nez | 13 March | |||||
| 2015 | Cap Gris-Nez | 1 October | Cap Gris-Nez | 1 October | |||||
| 2012 | Cap Gris-Nez | 4 February | Cap Gris-Nez | 4 February | |||||
| 2011 | Cap Gris-Nez | 3 October | Cap Gris-Nez | 3 October | |||||
| 2010 | Cap Gris-Nez | 26 December | Cap Gris-Nez | 26 December | |||||
| 2009 | Cap Gris-Nez | 7 November | Cap Gris-Nez | 7 November | |||||
| 2008 | Cap Gris-Nez | 8 October | Cap Gris-Nez | 28 October | |||||
| 2007 | Cap Gris-Nez | 29 March | Cap Gris-Nez | 17 November | |||||
| 2006 | Cap Gris-Nez | 7 January | Cap Gris-Nez | 7 January | |||||
| 2005 | Cap Gris-Nez | 26 October | Cap Gris-Nez | 17 November |
