Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 20 February | Breskens | 7 October | |||||
| 2013 | Breskens | 23 March | Breskens | 7 April | |||||
| 2008 | Breskens | 19 April | Breskens | 17 May | |||||
| 2007 | Breskens | 10 November | Breskens | 10 November | |||||
| 2006 | Breskens | 15 March | Breskens | 4 June | |||||
| 2005 | Breskens | 20 March | Breskens | 13 May | |||||
| 2004 | Breskens | 7 May | Breskens | 7 May | |||||
| 2003 | Breskens | 31 March | Breskens | 14 April | |||||
| 2001 | Breskens | 14 February | Breskens | 2 May | |||||
| 2000 | Breskens | 1 May | Breskens | 1 May | |||||
| 1999 | Breskens | 2 April | Breskens | 27 April | |||||
| 1998 | Breskens | 24 February | Breskens | 24 February | |||||
| 1997 | Breskens | 21 March | Breskens | 3 May | |||||
| 1996 | Breskens | 2 March | Breskens | 2 March | |||||
| 1994 | Breskens | 22 February | Breskens | 11 May | |||||
| 1992 | Breskens | 20 April | Breskens | 20 April | |||||
| 1991 | Breskens | 11 February | Breskens | 29 March | |||||
| 1990 | Breskens | 27 January | Breskens | 5 May | |||||
| 1989 | Breskens | 20 March | Breskens | 27 March | |||||
| 1988 | Breskens | 12 May | Breskens | 12 May | |||||
| 1986 | Breskens | 15 March | Breskens | 15 March | |||||
| 1983 | Breskens | 20 February | Breskens | 20 February | |||||
| 1982 | Breskens | 26 March | Breskens | 26 March |
