Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2023 | Breskens | 9 April | Breskens | 10 April | |||||
| 2021 | Breskens | 29 April | Breskens | 29 April | |||||
| 2020 | Breskens | 4 April | Breskens | 4 April | |||||
| 2019 | Breskens | 16 April | Breskens | 16 April | |||||
| 2018 | Breskens | 12 March | Breskens | 6 April | |||||
| 2016 | Breskens | 11 May | Breskens | 11 May | |||||
| 2015 | Breskens | 14 March | Breskens | 14 May | |||||
| 2013 | Breskens | 23 March | Breskens | 23 March | |||||
| 2012 | Breskens | 30 April | Breskens | 30 April | |||||
| 2011 | Breskens | 12 March | Breskens | 26 March | |||||
| 2010 | Breskens | 18 March | Breskens | 18 March | |||||
| 2008 | Breskens | 20 April | Breskens | 20 April | |||||
| 2007 | Breskens | 1 May | Breskens | 2 May | |||||
| 2005 | Breskens | 20 March | Breskens | 2 April | |||||
| 2003 | Breskens | 12 April | Breskens | 12 April | |||||
| 2002 | Breskens | 27 March | Breskens | 6 April | |||||
| 2001 | Breskens | 2 May | Breskens | 2 May | |||||
| 2000 | Breskens | 12 May | Breskens | 12 May | |||||
| 1999 | Breskens | 17 May | Breskens | 17 May | |||||
| 1998 | Breskens | 21 April | Breskens | 21 April | |||||
| 1995 | Breskens | 28 April | Breskens | 3 May | |||||
| 1990 | Breskens | 4 May | Breskens | 4 May | |||||
| 1989 | Breskens | 4 May | Breskens | 4 May |
