Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Cap Gris-Nez | 6 January | Cap Gris-Nez | 29 November | |||||
| 2021 | Cap Gris-Nez | 26 February | Cap Gris-Nez | 31 December | |||||
| 2020 | Cap Gris-Nez | 25 February | Cap Gris-Nez | 30 December | |||||
| 2019 | Cap Gris-Nez | 12 February | Cap Gris-Nez | 7 October | |||||
| 2018 | Cap Gris-Nez | 1 February | Cap Gris-Nez | 16 September | |||||
| 2017 | Cap Gris-Nez | 28 January | Cap Gris-Nez | 28 July | |||||
| 2016 | Cap Gris-Nez | 19 February | Cap Gris-Nez | 22 October | |||||
| 2015 | Cap Gris-Nez | 9 February | Cap Gris-Nez | 17 November | |||||
| 2014 | Cap Gris-Nez | 24 February | Cap Gris-Nez | 22 November | |||||
| 2013 | Cap Gris-Nez | 16 February | Cap Gris-Nez | 5 October | |||||
| 2012 | Cap Gris-Nez | 22 February | Cap Gris-Nez | 29 November | |||||
| 2011 | Cap Gris-Nez | 12 February | Cap Gris-Nez | 27 November | |||||
| 2010 | Cap Gris-Nez | 2 January | Cap Gris-Nez | 6 November | |||||
| 2009 | Cap Gris-Nez | 27 January | Cap Gris-Nez | 29 November | |||||
| 2008 | Cap Gris-Nez | 6 January | Cap Gris-Nez | 6 December | |||||
| 2007 | Cap Gris-Nez | 4 January | Cap Gris-Nez | 21 November | |||||
| 2006 | Cap Gris-Nez | 2 January | Cap Gris-Nez | 12 November | |||||
| 2005 | Cap Gris-Nez | 4 February | Cap Gris-Nez | 18 December | |||||
| 2004 | Cap Gris-Nez | 14 March | Cap Gris-Nez | 20 December | |||||
| 2003 | Cap Gris-Nez | 10 May | Cap Gris-Nez | 20 September | |||||
| 1987 | Cap Gris-Nez | 17 October | Cap Gris-Nez | 23 October | |||||
| 1986 | Cap Gris-Nez | 18 October | Cap Gris-Nez | 23 October | |||||
| 1962 | Cap Gris-Nez | 2 October | Cap Gris-Nez | 2 October | |||||
| 1960 | Cap Gris-Nez | 8 September | Cap Gris-Nez | 15 September |
