Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 16 September | Breskens | 18 October | |||||
| 2020 | Breskens | 4 April | Breskens | 4 April | |||||
| 2019 | Breskens | 22 September | Breskens | 8 November | |||||
| 2018 | Breskens | 6 April | Breskens | 21 April | |||||
| 2017 | Breskens | 9 September | Breskens | 9 September | |||||
| 2016 | Breskens | 26 March | Breskens | 8 May | |||||
| 2014 | Breskens | 24 February | Breskens | 21 April | |||||
| 2013 | Breskens | 8 April | Breskens | 7 May | |||||
| 2011 | Breskens | 12 March | Breskens | 2 April | |||||
| 2010 | Breskens | 24 March | Breskens | 26 September | |||||
| 2009 | Breskens | 20 March | Breskens | 19 May | |||||
| 2008 | Breskens | 23 April | Breskens | 8 November | |||||
| 2007 | Breskens | 5 October | Breskens | 23 October | |||||
| 2006 | Breskens | 1 April | Breskens | 5 May | |||||
| 2005 | Breskens | 17 October | Breskens | 11 November | |||||
| 2004 | Breskens | 30 March | Breskens | 6 May | |||||
| 2003 | Breskens | 22 March | Breskens | 19 October | |||||
| 2002 | Breskens | 24 March | Breskens | 29 April | |||||
| 2000 | Breskens | 24 April | Breskens | 24 April | |||||
| 1998 | Breskens | 29 March | Breskens | 9 May | |||||
| 1997 | Breskens | 8 April | Breskens | 23 May | |||||
| 1995 | Breskens | 1 May | Breskens | 16 May | |||||
| 1994 | Breskens | 30 March | Breskens | 23 April | |||||
| 1993 | Breskens | 13 April | Breskens | 13 April | |||||
| 1990 | Breskens | 18 March | Breskens | 5 May | |||||
| 1989 | Breskens | 27 March | Breskens | 16 May |
