Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Breskens | 18 April | Breskens | 18 April | |||||
| 2020 | Breskens | 27 October | Breskens | 31 October | |||||
| 2018 | Breskens | 14 March | Breskens | 14 March | |||||
| 2016 | Breskens | 6 May | Breskens | 6 May | |||||
| 2015 | Breskens | 3 October | Breskens | 3 October | |||||
| 2013 | Breskens | 14 April | Breskens | 14 April | |||||
| 2012 | Breskens | 22 March | Breskens | 26 May | |||||
| 2011 | Breskens | 2 April | Breskens | 2 April | |||||
| 2010 | Breskens | 7 November | Breskens | 7 November | |||||
| 2009 | Breskens | 1 March | Breskens | 19 May | |||||
| 2008 | Breskens | 13 April | Breskens | 3 May | |||||
| 2007 | Breskens | 28 April | Breskens | 30 April | |||||
| 2006 | Breskens | 23 April | Breskens | 12 June | |||||
| 2003 | Breskens | 30 April | Breskens | 30 April | |||||
| 2002 | Breskens | 2 February | Breskens | 16 May | |||||
| 2001 | Breskens | 31 March | Breskens | 13 May | |||||
| 2000 | Breskens | 9 April | Breskens | 13 May | |||||
| 1999 | Breskens | 25 April | Breskens | 25 April | |||||
| 1998 | Breskens | 28 March | Breskens | 17 May | |||||
| 1993 | Breskens | 9 May | Breskens | 9 May |
