Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 13 May | Breskens | 22 November | |||||
| 2020 | Breskens | 4 April | Breskens | 14 November | |||||
| 2019 | Breskens | 15 May | Breskens | 5 October | |||||
| 2018 | Breskens | 6 April | Breskens | 6 October | |||||
| 2017 | Breskens | 30 April | Breskens | 29 October | |||||
| 2016 | Breskens | 30 April | Breskens | 30 April | |||||
| 2015 | Breskens | 3 October | Breskens | 3 October | |||||
| 2014 | Breskens | 12 March | Breskens | 19 October | |||||
| 2013 | Breskens | 5 October | Breskens | 5 October | |||||
| 2012 | Breskens | 4 January | Breskens | 30 April | |||||
| 2011 | Breskens | 22 October | Breskens | 22 October | |||||
| 2010 | Breskens | 4 May | Breskens | 2 October | |||||
| 2009 | Breskens | 18 April | Breskens | 3 October | |||||
| 2008 | Breskens | 31 March | Breskens | 17 May | |||||
| 2007 | Breskens | 24 September | Breskens | 10 November | |||||
| 2006 | Breskens | 4 May | Breskens | 6 May | |||||
| 2005 | Breskens | 15 January | Breskens | 11 November | |||||
| 2003 | Breskens | 20 April | Breskens | 20 April | |||||
| 2002 | Breskens | 4 April | Breskens | 3 June | |||||
| 2001 | Breskens | 17 March | Breskens | 13 April | |||||
| 2000 | Breskens | 28 April | Breskens | 28 April | |||||
| 1999 | Breskens | 7 May | Breskens | 7 May | |||||
| 1998 | Breskens | 12 March | Breskens | 12 March | |||||
| 1997 | Breskens | 4 April | Breskens | 17 May | |||||
| 1995 | Breskens | 23 April | Breskens | 4 May | |||||
| 1994 | Breskens | 6 May | Breskens | 14 May | |||||
| 1991 | Breskens | 10 June | Breskens | 10 June | |||||
| 1990 | Breskens | 2 March | Breskens | 2 March | |||||
| 1989 | Breskens | 21 March | Breskens | 19 April | |||||
| 1985 | Breskens | 28 April | Breskens | 29 April | |||||
| 1981 | Breskens | 15 May | Breskens | 15 May | |||||
| 1900 | Breskens | 16 May | Breskens | 16 May |
