Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Cap Gris-Nez | 1 May | Cap Gris-Nez | 10 September | |||||
| 2021 | Cap Gris-Nez | 28 April | Cap Gris-Nez | 28 September | |||||
| 2020 | Cap Gris-Nez | 18 July | Cap Gris-Nez | 10 September | |||||
| 2019 | Cap Gris-Nez | 1 May | Cap Gris-Nez | 6 September | |||||
| 2018 | Cap Gris-Nez | 29 April | Cap Gris-Nez | 6 October | |||||
| 2017 | Cap Gris-Nez | 23 April | Cap Gris-Nez | 14 September | |||||
| 2016 | Cap Gris-Nez | 20 April | Cap Gris-Nez | 23 September | |||||
| 2015 | Cap Gris-Nez | 10 May | Cap Gris-Nez | 25 September | |||||
| 2014 | Cap Gris-Nez | 19 May | Cap Gris-Nez | 5 October | |||||
| 2013 | Cap Gris-Nez | 8 May | Cap Gris-Nez | 15 September | |||||
| 2012 | Cap Gris-Nez | 1 May | Cap Gris-Nez | 12 September | |||||
| 2011 | Cap Gris-Nez | 25 August | Cap Gris-Nez | 1 October | |||||
| 2010 | Cap Gris-Nez | 2 May | Cap Gris-Nez | 30 September | |||||
| 2009 | Cap Gris-Nez | 10 May | Cap Gris-Nez | 29 August | |||||
| 2008 | Cap Gris-Nez | 22 April | Cap Gris-Nez | 13 September | |||||
| 2007 | Cap Gris-Nez | 15 April | Cap Gris-Nez | 23 September | |||||
| 2006 | Cap Gris-Nez | 8 May | Cap Gris-Nez | 1 October | |||||
| 2005 | Cap Gris-Nez | 20 April | Cap Gris-Nez | 10 September | |||||
| 1987 | Cap Gris-Nez | 19 October | Cap Gris-Nez | 20 October | |||||
| 1963 | Cap Gris-Nez | 29 August | Cap Gris-Nez | 22 September | |||||
| 1962 | Cap Gris-Nez | 24 September | Cap Gris-Nez | 30 September | |||||
| 1961 | Cap Gris-Nez | 19 August | Cap Gris-Nez | 17 September | |||||
| 1958 | Cap Gris-Nez | 4 September | Cap Gris-Nez | 13 September | |||||
| 1956 | Cap Gris-Nez | 3 October | Cap Gris-Nez | 3 October |
