Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Cap Gris-Nez | 19 March | Cap Gris-Nez | 22 April | |||||
| 2021 | Cap Gris-Nez | 8 February | Cap Gris-Nez | 29 October | |||||
| 2020 | Cap Gris-Nez | 29 August | Cap Gris-Nez | 27 September | |||||
| 2019 | Cap Gris-Nez | 1 November | Cap Gris-Nez | 1 November | |||||
| 2018 | Cap Gris-Nez | 21 August | Cap Gris-Nez | 2 October | |||||
| 2017 | Cap Gris-Nez | 7 October | Cap Gris-Nez | 12 November | |||||
| 2016 | Cap Gris-Nez | 17 September | Cap Gris-Nez | 28 September | |||||
| 2014 | Cap Gris-Nez | 10 November | Cap Gris-Nez | 10 November | |||||
| 2013 | Cap Gris-Nez | 11 September | Cap Gris-Nez | 22 November | |||||
| 2011 | Cap Gris-Nez | 9 October | Cap Gris-Nez | 28 November | |||||
| 2009 | Cap Gris-Nez | 22 March | Cap Gris-Nez | 22 March | |||||
| 2008 | Cap Gris-Nez | 17 August | Cap Gris-Nez | 31 August | |||||
| 2007 | Cap Gris-Nez | 5 August | Cap Gris-Nez | 21 October | |||||
| 2006 | Cap Gris-Nez | 30 July | Cap Gris-Nez | 1 October | |||||
| 2005 | Cap Gris-Nez | 19 August | Cap Gris-Nez | 22 September | |||||
| 1987 | Cap Gris-Nez | 20 October | Cap Gris-Nez | 20 October | |||||
| 1963 | Cap Gris-Nez | 29 August | Cap Gris-Nez | 23 September | |||||
| 1962 | Cap Gris-Nez | 23 September | Cap Gris-Nez | 5 October | |||||
| 1961 | Cap Gris-Nez | 26 August | Cap Gris-Nez | 22 September | |||||
| 1958 | Cap Gris-Nez | 5 September | Cap Gris-Nez | 13 September |
