Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Cap Gris-Nez | 12 may | Cap Gris-Nez | 27 september | |||||
| 2019 | Cap Gris-Nez | 31 march | Cap Gris-Nez | 7 september | |||||
| 2018 | Cap Gris-Nez | 7 april | Cap Gris-Nez | 13 november | |||||
| 2017 | Cap Gris-Nez | 9 april | Cap Gris-Nez | 18 september | |||||
| 2016 | Cap Gris-Nez | 5 april | Cap Gris-Nez | 31 august | |||||
| 2015 | Cap Gris-Nez | 11 april | Cap Gris-Nez | 19 september | |||||
| 2014 | Cap Gris-Nez | 13 april | Cap Gris-Nez | 27 november | |||||
| 2013 | Cap Gris-Nez | 4 april | Cap Gris-Nez | 10 october | |||||
| 2012 | Cap Gris-Nez | 25 march | Cap Gris-Nez | 12 september | |||||
| 2011 | Cap Gris-Nez | 5 april | Cap Gris-Nez | 9 october | |||||
| 2010 | Cap Gris-Nez | 8 april | Cap Gris-Nez | 19 september | |||||
| 2009 | Cap Gris-Nez | 18 april | Cap Gris-Nez | 1 october | |||||
| 2008 | Cap Gris-Nez | 5 april | Cap Gris-Nez | 13 september | |||||
| 2007 | Cap Gris-Nez | 30 march | Cap Gris-Nez | 23 september | |||||
| 2006 | Cap Gris-Nez | 12 april | Cap Gris-Nez | 1 november | |||||
| 2005 | Cap Gris-Nez | 15 april | Cap Gris-Nez | 12 october | |||||
| 2004 | Cap Gris-Nez | 9 may | Cap Gris-Nez | 16 may | |||||
| 2003 | Cap Gris-Nez | 10 may | Cap Gris-Nez | 22 august | |||||
| 1986 | Cap Gris-Nez | 22 october | Cap Gris-Nez | 22 october | |||||
| 1978 | Cap Gris-Nez | 30 march | Cap Gris-Nez | 30 march |
