Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Cap Gris-Nez | 3 july | Cap Gris-Nez | 10 october | |||||
| 2019 | Cap Gris-Nez | 9 march | Cap Gris-Nez | 10 november | |||||
| 2018 | Cap Gris-Nez | 18 february | Cap Gris-Nez | 15 november | |||||
| 2017 | Cap Gris-Nez | 28 march | Cap Gris-Nez | 14 november | |||||
| 2016 | Cap Gris-Nez | 10 march | Cap Gris-Nez | 22 october | |||||
| 2015 | Cap Gris-Nez | 1 october | Cap Gris-Nez | 11 november | |||||
| 2014 | Cap Gris-Nez | 14 march | Cap Gris-Nez | 15 november | |||||
| 2013 | Cap Gris-Nez | 6 march | Cap Gris-Nez | 5 october | |||||
| 2012 | Cap Gris-Nez | 17 march | Cap Gris-Nez | 9 november | |||||
| 2011 | Cap Gris-Nez | 13 march | Cap Gris-Nez | 17 december | |||||
| 2010 | Cap Gris-Nez | 11 april | Cap Gris-Nez | 26 december | |||||
| 2009 | Cap Gris-Nez | 11 april | Cap Gris-Nez | 5 november | |||||
| 2008 | Cap Gris-Nez | 3 april | Cap Gris-Nez | 28 october | |||||
| 2007 | Cap Gris-Nez | 10 march | Cap Gris-Nez | 11 december | |||||
| 2006 | Cap Gris-Nez | 2 january | Cap Gris-Nez | 26 november | |||||
| 2005 | Cap Gris-Nez | 10 april | Cap Gris-Nez | 11 december | |||||
| 2004 | Cap Gris-Nez | 9 may | Cap Gris-Nez | 14 may | |||||
| 1977 | Cap Gris-Nez | 1 october | Cap Gris-Nez | 1 october |
