Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Cap Gris-Nez | 13 may | Cap Gris-Nez | 15 october | |||||
| 2019 | Cap Gris-Nez | 26 february | Cap Gris-Nez | 27 december | |||||
| 2018 | Cap Gris-Nez | 10 march | Cap Gris-Nez | 21 november | |||||
| 2017 | Cap Gris-Nez | 11 march | Cap Gris-Nez | 3 december | |||||
| 2016 | Cap Gris-Nez | 6 march | Cap Gris-Nez | 11 november | |||||
| 2015 | Cap Gris-Nez | 6 march | Cap Gris-Nez | 22 november | |||||
| 2014 | Cap Gris-Nez | 9 march | Cap Gris-Nez | 22 november | |||||
| 2013 | Cap Gris-Nez | 1 march | Cap Gris-Nez | 12 december | |||||
| 2012 | Cap Gris-Nez | 4 february | Cap Gris-Nez | 2 december | |||||
| 2011 | Cap Gris-Nez | 12 february | Cap Gris-Nez | 17 december | |||||
| 2010 | Cap Gris-Nez | 6 march | Cap Gris-Nez | 25 november | |||||
| 2009 | Cap Gris-Nez | 22 february | Cap Gris-Nez | 6 november | |||||
| 2008 | Cap Gris-Nez | 6 january | Cap Gris-Nez | 22 november | |||||
| 2007 | Cap Gris-Nez | 14 march | Cap Gris-Nez | 11 december | |||||
| 2006 | Cap Gris-Nez | 10 march | Cap Gris-Nez | 10 december | |||||
| 2005 | Cap Gris-Nez | 13 march | Cap Gris-Nez | 11 december | |||||
| 2004 | Cap Gris-Nez | 5 october | Cap Gris-Nez | 5 october | |||||
| 1987 | Cap Gris-Nez | 21 october | Cap Gris-Nez | 21 october | |||||
| 1982 | Cap Gris-Nez | 10 april | Cap Gris-Nez | 10 april | |||||
| 1978 | Cap Gris-Nez | 30 september | Cap Gris-Nez | 1 october | |||||
| 1977 | Cap Gris-Nez | 19 november | Cap Gris-Nez | 19 november | |||||
| 1956 | Cap Gris-Nez | 6 october | Cap Gris-Nez | 6 october |
