Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Breskens | 4 March | Breskens | 25 May | |||||
| 2021 | Breskens | 5 February | Breskens | 7 October | |||||
| 2020 | Breskens | 7 February | Breskens | 6 December | |||||
| 2019 | Breskens | 18 February | Breskens | 8 November | |||||
| 2018 | Breskens | 3 March | Breskens | 6 October | |||||
| 2017 | Breskens | 24 March | Breskens | 30 September | |||||
| 2016 | Breskens | 1 April | Breskens | 1 October | |||||
| 2015 | Breskens | 22 March | Breskens | 3 October | |||||
| 2014 | Breskens | 28 March | Breskens | 4 October | |||||
| 2013 | Breskens | 1 April | Breskens | 8 April | |||||
| 2012 | Breskens | 4 March | Breskens | 4 March | |||||
| 2011 | Breskens | 29 January | Breskens | 18 April | |||||
| 2010 | Breskens | 21 March | Breskens | 2 October | |||||
| 2009 | Breskens | 2 April | Breskens | 3 October | |||||
| 2007 | Breskens | 1 September | Breskens | 1 September | |||||
| 2005 | Breskens | 7 March | Breskens | 7 March | |||||
| 1992 | Breskens | 28 February | Breskens | 5 March | |||||
| 1991 | Breskens | 17 February | Breskens | 13 April | |||||
| 1989 | Breskens | 4 February | Breskens | 16 March | |||||
| 1988 | Breskens | 27 February | Breskens | 27 February | |||||
| 1987 | Breskens | 28 February | Breskens | 30 April |
