Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 21 February | Breskens | 21 February | |||||
| 2019 | Breskens | 29 October | Breskens | 29 October | |||||
| 2017 | Breskens | 14 February | Breskens | 14 February | |||||
| 2013 | Breskens | 5 March | Breskens | 5 March | |||||
| 2010 | Breskens | 13 March | Breskens | 13 March | |||||
| 2008 | Breskens | 24 February | Breskens | 13 December | |||||
| 2007 | Breskens | 23 October | Breskens | 23 October | |||||
| 2005 | Breskens | 8 March | Breskens | 3 December | |||||
| 2003 | Breskens | 1 March | Breskens | 3 March | |||||
| 2002 | Breskens | 1 March | Breskens | 1 March | |||||
| 2001 | Breskens | 27 February | Breskens | 27 February | |||||
| 1998 | Breskens | 18 February | Breskens | 22 February | |||||
| 1997 | Breskens | 23 February | Breskens | 14 March | |||||
| 1994 | Breskens | 5 March | Breskens | 5 March | |||||
| 1992 | Breskens | 25 March | Breskens | 25 March | |||||
| 1986 | Breskens | 15 March | Breskens | 2 April |
