Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2023 | Breskens | 3 May | Breskens | 28 May | |||||
| 2021 | Breskens | 9 May | Breskens | 16 September | |||||
| 2020 | Breskens | 7 May | Breskens | 13 June | |||||
| 2019 | Breskens | 15 May | Breskens | 29 August | |||||
| 2018 | Breskens | 8 May | Breskens | 27 May | |||||
| 2017 | Breskens | 6 May | Breskens | 22 May | |||||
| 2016 | Breskens | 6 May | Breskens | 9 May | |||||
| 2015 | Breskens | 11 May | Breskens | 15 May | |||||
| 2014 | Breskens | 19 May | Breskens | 30 May | |||||
| 2013 | Breskens | 27 April | Breskens | 3 May | |||||
| 2012 | Breskens | 1 May | Breskens | 27 May | |||||
| 2011 | Breskens | 22 April | Breskens | 8 May | |||||
| 2010 | Breskens | 23 May | Breskens | 23 May | |||||
| 2008 | Breskens | 4 May | Breskens | 24 May | |||||
| 2007 | Breskens | 23 May | Breskens | 24 May | |||||
| 2006 | Breskens | 3 May | Breskens | 9 June | |||||
| 2005 | Breskens | 30 April | Breskens | 27 May | |||||
| 2004 | Breskens | 7 May | Breskens | 29 May | |||||
| 2003 | Breskens | 21 April | Breskens | 29 May | |||||
| 2002 | Breskens | 8 May | Breskens | 3 June | |||||
| 2001 | Breskens | 3 May | Breskens | 23 May | |||||
| 2000 | Breskens | 25 April | Breskens | 16 May | |||||
| 1999 | Breskens | 2 May | Breskens | 19 May | |||||
| 1998 | Breskens | 23 April | Breskens | 20 June | |||||
| 1997 | Breskens | 3 May | Breskens | 3 June | |||||
| 1996 | Breskens | 21 April | Breskens | 2 May | |||||
| 1995 | Breskens | 4 May | Breskens | 26 May | |||||
| 1994 | Breskens | 3 May | Breskens | 14 May | |||||
| 1993 | Breskens | 30 April | Breskens | 26 May | |||||
| 1992 | Breskens | 13 May | Breskens | 23 May | |||||
| 1991 | Breskens | 27 May | Breskens | 30 May | |||||
| 1990 | Breskens | 5 May | Breskens | 20 May | |||||
| 1989 | Breskens | 23 May | Breskens | 23 May | |||||
| 1986 | Breskens | 20 May | Breskens | 20 May | |||||
| 1981 | Breskens | 9 May | Breskens | 10 May |
