Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Cap Gris-Nez | 21 may | Cap Gris-Nez | 21 may | |||||
| 2018 | Cap Gris-Nez | 16 september | Cap Gris-Nez | 16 september | |||||
| 2017 | Cap Gris-Nez | 15 september | Cap Gris-Nez | 15 september | |||||
| 2015 | Cap Gris-Nez | 21 april | Cap Gris-Nez | 21 april | |||||
| 2014 | Cap Gris-Nez | 13 may | Cap Gris-Nez | 13 may | |||||
| 2010 | Cap Gris-Nez | 14 may | Cap Gris-Nez | 14 may | |||||
| 2005 | Cap Gris-Nez | 6 may | Cap Gris-Nez | 9 october |
