Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2019 | Breskens | 13 May | Breskens | 13 May | |||||
| 2014 | Breskens | 28 March | Breskens | 28 March | |||||
| 2013 | Breskens | 24 March | Breskens | 24 March | |||||
| 2011 | Breskens | 24 March | Breskens | 24 March | |||||
| 2010 | Breskens | 15 April | Breskens | 15 April | |||||
| 2008 | Breskens | 23 February | Breskens | 21 April | |||||
| 2007 | Breskens | 24 March | Breskens | 24 March | |||||
| 2006 | Breskens | 26 March | Breskens | 26 March | |||||
| 2005 | Breskens | 16 March | Breskens | 16 March | |||||
| 2003 | Breskens | 27 February | Breskens | 21 April | |||||
| 2001 | Breskens | 13 May | Breskens | 13 May | |||||
| 1998 | Breskens | 22 March | Breskens | 22 March | |||||
| 1996 | Breskens | 4 May | Breskens | 4 May | |||||
| 1995 | Breskens | 6 May | Breskens | 6 May | |||||
| 1994 | Breskens | 29 April | Breskens | 29 April | |||||
| 1993 | Breskens | 5 March | Breskens | 24 April | |||||
| 1992 | Breskens | 12 April | Breskens | 12 April | |||||
| 1991 | Breskens | 11 May | Breskens | 11 May | |||||
| 1990 | Breskens | 8 April | Breskens | 8 April | |||||
| 1987 | Breskens | 7 March | Breskens | 15 March | |||||
| 1982 | Breskens | 15 March | Breskens | 15 March |
