Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2023 | Cap Gris-Nez | 24 March | Cap Gris-Nez | 24 March | |||||
| 2022 | Cap Gris-Nez | 19 October | Cap Gris-Nez | 19 October | |||||
| 2021 | Cap Gris-Nez | 19 September | Cap Gris-Nez | 27 October | |||||
| 2020 | Cap Gris-Nez | 7 October | Cap Gris-Nez | 7 October | |||||
| 2017 | Cap Gris-Nez | 4 October | Cap Gris-Nez | 6 October | |||||
| 2016 | Cap Gris-Nez | 22 October | Cap Gris-Nez | 22 October | |||||
| 2015 | Cap Gris-Nez | 4 October | Cap Gris-Nez | 4 October | |||||
| 2014 | Cap Gris-Nez | 14 March | Cap Gris-Nez | 31 October | |||||
| 2013 | Cap Gris-Nez | 28 September | Cap Gris-Nez | 28 September | |||||
| 2012 | Cap Gris-Nez | 6 November | Cap Gris-Nez | 6 November | |||||
| 2011 | Cap Gris-Nez | 10 October | Cap Gris-Nez | 12 October | |||||
| 2010 | Cap Gris-Nez | 12 September | Cap Gris-Nez | 12 September | |||||
| 2009 | Cap Gris-Nez | 5 September | Cap Gris-Nez | 5 September | |||||
| 2008 | Cap Gris-Nez | 3 April | Cap Gris-Nez | 20 September | |||||
| 2007 | Cap Gris-Nez | 2 January | Cap Gris-Nez | 23 September | |||||
| 2006 | Cap Gris-Nez | 7 January | Cap Gris-Nez | 17 September | |||||
| 2005 | Cap Gris-Nez | 28 September | Cap Gris-Nez | 30 October | |||||
| 2004 | Cap Gris-Nez | 5 October | Cap Gris-Nez | 5 October |
