Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 9 May | Breskens | 30 May | |||||
| 2020 | Breskens | 18 April | Breskens | 18 April | |||||
| 2019 | Breskens | 16 April | Breskens | 13 May | |||||
| 2018 | Breskens | 19 April | Breskens | 24 May | |||||
| 2017 | Breskens | 27 May | Breskens | 27 May | |||||
| 2016 | Breskens | 5 May | Breskens | 7 May | |||||
| 2015 | Breskens | 24 April | Breskens | 24 April | |||||
| 2014 | Breskens | 25 April | Breskens | 5 May | |||||
| 2012 | Breskens | 29 April | Breskens | 25 May | |||||
| 2011 | Breskens | 23 April | Breskens | 5 May | |||||
| 2009 | Breskens | 10 April | Breskens | 10 April | |||||
| 2008 | Breskens | 27 April | Breskens | 11 May | |||||
| 2007 | Breskens | 21 April | Breskens | 1 May | |||||
| 2006 | Breskens | 3 May | Breskens | 4 May | |||||
| 2005 | Breskens | 1 May | Breskens | 1 May | |||||
| 2004 | Breskens | 15 April | Breskens | 29 April | |||||
| 2003 | Breskens | 15 April | Breskens | 18 October | |||||
| 2001 | Breskens | 9 May | Breskens | 23 May | |||||
| 2000 | Breskens | 6 May | Breskens | 6 May | |||||
| 1999 | Breskens | 19 May | Breskens | 19 May | |||||
| 1998 | Breskens | 29 March | Breskens | 16 May | |||||
| 1996 | Breskens | 1 May | Breskens | 5 May | |||||
| 1995 | Breskens | 4 May | Breskens | 4 May | |||||
| 1994 | Breskens | 3 May | Breskens | 12 May | |||||
| 1992 | Breskens | 9 April | Breskens | 28 May | |||||
| 1991 | Breskens | 11 April | Breskens | 27 April | |||||
| 1990 | Breskens | 2 May | Breskens | 27 May |
