Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2023 | Breskens | 7 February | Breskens | 20 March | |||||
| 2022 | Breskens | 27 February | Breskens | 16 October | |||||
| 2021 | Breskens | 18 February | Breskens | 3 November | |||||
| 2020 | Breskens | 7 February | Breskens | 6 December | |||||
| 2019 | Breskens | 23 February | Breskens | 10 November | |||||
| 2018 | Breskens | 3 March | Breskens | 6 October | |||||
| 2017 | Breskens | 3 March | Breskens | 30 September | |||||
| 2016 | Breskens | 13 February | Breskens | 1 October | |||||
| 2015 | Breskens | 11 March | Breskens | 5 June | |||||
| 2014 | Breskens | 9 March | Breskens | 4 October | |||||
| 2013 | Breskens | 18 February | Breskens | 5 October | |||||
| 2012 | Breskens | 19 February | Breskens | 4 March | |||||
| 2011 | Breskens | 15 March | Breskens | 8 May | |||||
| 2010 | Breskens | 6 February | Breskens | 7 November | |||||
| 2009 | Breskens | 6 March | Breskens | 1 November | |||||
| 2008 | Breskens | 7 February | Breskens | 5 October | |||||
| 2007 | Breskens | 16 February | Breskens | 1 September | |||||
| 2006 | Breskens | 23 February | Breskens | 28 October | |||||
| 2005 | Breskens | 29 January | Breskens | 11 June | |||||
| 2003 | Breskens | 18 October | Breskens | 18 October | |||||
| 2002 | Breskens | 23 March | Breskens | 24 March | |||||
| 1997 | Breskens | 23 February | Breskens | 15 April | |||||
| 1995 | Breskens | 11 March | Breskens | 26 April | |||||
| 1994 | Breskens | 31 January | Breskens | 21 May | |||||
| 1993 | Breskens | 5 March | Breskens | 6 June | |||||
| 1992 | Breskens | 14 March | Breskens | 11 June | |||||
| 1991 | Breskens | 13 March | Breskens | 31 May | |||||
| 1990 | Breskens | 2 March | Breskens | 31 May | |||||
| 1989 | Breskens | 29 March | Breskens | 10 May | |||||
| 1988 | Breskens | 20 February | Breskens | 14 April | |||||
| 1985 | Breskens | 6 May | Breskens | 6 May | |||||
| 1981 | Breskens | 10 May | Breskens | 10 May |
