Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Breskens | 19 October | Breskens | 15 November | |||||
| 2021 | Breskens | 23 October | Breskens | 7 December | |||||
| 2020 | Breskens | 14 March | Breskens | 6 December | |||||
| 2019 | Breskens | 20 March | Breskens | 25 November | |||||
| 2017 | Breskens | 15 February | Breskens | 16 March | |||||
| 2016 | Breskens | 10 April | Breskens | 10 April | |||||
| 2013 | Breskens | 4 April | Breskens | 4 April | |||||
| 2012 | Breskens | 13 October | Breskens | 13 October | |||||
| 2011 | Breskens | 22 February | Breskens | 22 February | |||||
| 2010 | Breskens | 2 October | Breskens | 2 October | |||||
| 2007 | Breskens | 16 February | Breskens | 22 December | |||||
| 2006 | Breskens | 5 May | Breskens | 5 May | |||||
| 2005 | Breskens | 16 January | Breskens | 4 February | |||||
| 2004 | Breskens | 11 March | Breskens | 11 March | |||||
| 2003 | Breskens | 26 February | Breskens | 18 October | |||||
| 2002 | Breskens | 18 January | Breskens | 29 January | |||||
| 2001 | Breskens | 14 February | Breskens | 12 March | |||||
| 1999 | Breskens | 21 January | Breskens | 28 March | |||||
| 1998 | Breskens | 10 February | Breskens | 18 February | |||||
| 1997 | Breskens | 22 March | Breskens | 22 March | |||||
| 1996 | Breskens | 9 January | Breskens | 9 January | |||||
| 1994 | Breskens | 26 February | Breskens | 11 March | |||||
| 1992 | Breskens | 9 February | Breskens | 9 February | |||||
| 1991 | Breskens | 16 February | Breskens | 16 February | |||||
| 1990 | Breskens | 27 January | Breskens | 23 February | |||||
| 1989 | Breskens | 7 February | Breskens | 10 February | |||||
| 1987 | Breskens | 15 March | Breskens | 15 March | |||||
| 1986 | Breskens | 15 February | Breskens | 14 March | |||||
| 1985 | Breskens | 8 February | Breskens | 13 May |
