Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Cap Gris-Nez | 15 may | Cap Gris-Nez | 27 september | |||||
| 2019 | Cap Gris-Nez | 13 april | Cap Gris-Nez | 2 september | |||||
| 2018 | Cap Gris-Nez | 11 april | Cap Gris-Nez | 1 october | |||||
| 2017 | Cap Gris-Nez | 10 april | Cap Gris-Nez | 29 october | |||||
| 2016 | Cap Gris-Nez | 26 april | Cap Gris-Nez | 18 september | |||||
| 2015 | Cap Gris-Nez | 11 april | Cap Gris-Nez | 30 july | |||||
| 2014 | Cap Gris-Nez | 8 april | Cap Gris-Nez | 10 october | |||||
| 2013 | Cap Gris-Nez | 20 september | Cap Gris-Nez | 11 october | |||||
| 2012 | Cap Gris-Nez | 23 september | Cap Gris-Nez | 14 october | |||||
| 2011 | Cap Gris-Nez | 20 september | Cap Gris-Nez | 10 october | |||||
| 2010 | Cap Gris-Nez | 31 july | Cap Gris-Nez | 1 november | |||||
| 2009 | Cap Gris-Nez | 2 may | Cap Gris-Nez | 11 october | |||||
| 2008 | Cap Gris-Nez | 8 may | Cap Gris-Nez | 13 october | |||||
| 2007 | Cap Gris-Nez | 25 april | Cap Gris-Nez | 18 october | |||||
| 2006 | Cap Gris-Nez | 12 april | Cap Gris-Nez | 31 october | |||||
| 2005 | Cap Gris-Nez | 5 april | Cap Gris-Nez | 15 november | |||||
| 2004 | Cap Gris-Nez | 9 may | Cap Gris-Nez | 15 september | |||||
| 1987 | Cap Gris-Nez | 17 october | Cap Gris-Nez | 22 october | |||||
| 1986 | Cap Gris-Nez | 23 october | Cap Gris-Nez | 23 october | |||||
| 1978 | Cap Gris-Nez | 30 september | Cap Gris-Nez | 1 october | |||||
| 1977 | Cap Gris-Nez | 1 october | Cap Gris-Nez | 2 october | |||||
| 1958 | Cap Gris-Nez | 4 september | Cap Gris-Nez | 4 september | |||||
| 1956 | Cap Gris-Nez | 3 october | Cap Gris-Nez | 6 october |
