Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2023 | Breskens | 7 February | Breskens | 28 March | |||||
| 2022 | Breskens | 9 October | Breskens | 19 November | |||||
| 2021 | Breskens | 5 February | Breskens | 20 November | |||||
| 2020 | Breskens | 5 October | Breskens | 28 November | |||||
| 2019 | Breskens | 15 February | Breskens | 15 February | |||||
| 2017 | Breskens | 23 April | Breskens | 27 May | |||||
| 2016 | Breskens | 25 January | Breskens | 10 April | |||||
| 2014 | Breskens | 22 February | Breskens | 30 March | |||||
| 2013 | Breskens | 18 February | Breskens | 30 April | |||||
| 2012 | Breskens | 20 February | Breskens | 20 February | |||||
| 2011 | Breskens | 13 February | Breskens | 13 February | |||||
| 2010 | Breskens | 9 March | Breskens | 7 November | |||||
| 2008 | Breskens | 8 November | Breskens | 13 December | |||||
| 2007 | Breskens | 8 October | Breskens | 22 December | |||||
| 2006 | Breskens | 16 October | Breskens | 25 November | |||||
| 2005 | Breskens | 11 January | Breskens | 5 February | |||||
| 2004 | Breskens | 4 February | Breskens | 14 February | |||||
| 2003 | Breskens | 8 February | Breskens | 3 March | |||||
| 2002 | Breskens | 25 January | Breskens | 18 March | |||||
| 2001 | Breskens | 10 February | Breskens | 10 March | |||||
| 1999 | Breskens | 3 February | Breskens | 3 February | |||||
| 1998 | Breskens | 10 January | Breskens | 10 March | |||||
| 1997 | Breskens | 23 February | Breskens | 18 March | |||||
| 1996 | Breskens | 2 March | Breskens | 23 March | |||||
| 1994 | Breskens | 8 February | Breskens | 26 February | |||||
| 1992 | Breskens | 2 February | Breskens | 7 May | |||||
| 1991 | Breskens | 3 February | Breskens | 31 March | |||||
| 1990 | Breskens | 28 April | Breskens | 28 April | |||||
| 1989 | Breskens | 4 February | Breskens | 4 February |
