Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2023 | Breskens | 26 March | Breskens | 27 April | |||||
| 2022 | Breskens | 10 March | Breskens | 16 November | |||||
| 2021 | Breskens | 21 February | Breskens | 16 October | |||||
| 2020 | Breskens | 7 March | Breskens | 14 November | |||||
| 2019 | Breskens | 24 March | Breskens | 25 October | |||||
| 2018 | Breskens | 10 March | Breskens | 7 May | |||||
| 2017 | Breskens | 25 March | Breskens | 30 April | |||||
| 2016 | Breskens | 12 March | Breskens | 1 October | |||||
| 2015 | Breskens | 9 April | Breskens | 2 May | |||||
| 2014 | Breskens | 24 February | Breskens | 19 October | |||||
| 2013 | Breskens | 4 March | Breskens | 5 October | |||||
| 2012 | Breskens | 4 January | Breskens | 27 May | |||||
| 2011 | Breskens | 5 March | Breskens | 8 May | |||||
| 2010 | Breskens | 6 April | Breskens | 6 April | |||||
| 2009 | Breskens | 1 March | Breskens | 16 May | |||||
| 2008 | Breskens | 4 February | Breskens | 3 May | |||||
| 2007 | Breskens | 25 March | Breskens | 1 April | |||||
| 2006 | Breskens | 23 February | Breskens | 6 May | |||||
| 2005 | Breskens | 17 January | Breskens | 14 May | |||||
| 2004 | Breskens | 31 March | Breskens | 30 April | |||||
| 2003 | Breskens | 24 March | Breskens | 22 April | |||||
| 2001 | Breskens | 30 April | Breskens | 30 April | |||||
| 1998 | Breskens | 30 April | Breskens | 30 April |
