Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Breskens | 9 April | Breskens | 7 October | |||||
| 2018 | Breskens | 11 May | Breskens | 20 May | |||||
| 2014 | Breskens | 4 October | Breskens | 4 October | |||||
| 2013 | Breskens | 8 May | Breskens | 8 May | |||||
| 2010 | Breskens | 26 September | Breskens | 2 October | |||||
| 2009 | Breskens | 10 April | Breskens | 19 April | |||||
| 2008 | Breskens | 15 April | Breskens | 5 October | |||||
| 2007 | Breskens | 26 May | Breskens | 24 September | |||||
| 2006 | Breskens | 19 August | Breskens | 16 October | |||||
| 2005 | Breskens | 14 April | Breskens | 16 May | |||||
| 2003 | Breskens | 7 April | Breskens | 7 April | |||||
| 2002 | Breskens | 4 April | Breskens | 13 May | |||||
| 2001 | Breskens | 3 April | Breskens | 22 April | |||||
| 2000 | Breskens | 9 April | Breskens | 30 April | |||||
| 1999 | Breskens | 16 April | Breskens | 16 April | |||||
| 1998 | Breskens | 21 April | Breskens | 26 May | |||||
| 1997 | Breskens | 5 April | Breskens | 12 May | |||||
| 1996 | Breskens | 9 April | Breskens | 16 May | |||||
| 1994 | Breskens | 22 April | Breskens | 14 May | |||||
| 1993 | Breskens | 9 April | Breskens | 17 May | |||||
| 1992 | Breskens | 8 April | Breskens | 11 June | |||||
| 1991 | Breskens | 12 April | Breskens | 31 May | |||||
| 1990 | Breskens | 31 March | Breskens | 31 May | |||||
| 1989 | Breskens | 25 April | Breskens | 12 June | |||||
| 1988 | Breskens | 20 May | Breskens | 20 May | |||||
| 1987 | Breskens | 23 April | Breskens | 27 May | |||||
| 1986 | Breskens | 26 April | Breskens | 20 May | |||||
| 1985 | Breskens | 17 April | Breskens | 18 May | |||||
| 1984 | Breskens | 20 April | Breskens | 19 May | |||||
| 1983 | Breskens | 16 April | Breskens | 6 May | |||||
| 1980 | Breskens | 5 October | Breskens | 5 October |
