Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Breskens | 12 February | Breskens | 21 October | |||||
| 2021 | Breskens | 20 February | Breskens | 7 December | |||||
| 2020 | Breskens | 5 April | Breskens | 6 December | |||||
| 2019 | Breskens | 21 September | Breskens | 3 November | |||||
| 2017 | Breskens | 31 March | Breskens | 30 September | |||||
| 2014 | Breskens | 4 October | Breskens | 4 October | |||||
| 2013 | Breskens | 9 April | Breskens | 9 April | |||||
| 2012 | Breskens | 24 March | Breskens | 21 April | |||||
| 2008 | Breskens | 31 March | Breskens | 21 April | |||||
| 2007 | Breskens | 28 March | Breskens | 28 March | |||||
| 2004 | Breskens | 9 March | Breskens | 9 March | |||||
| 2003 | Breskens | 23 February | Breskens | 15 April | |||||
| 1999 | Breskens | 31 March | Breskens | 31 March | |||||
| 1998 | Breskens | 28 March | Breskens | 28 March | |||||
| 1997 | Breskens | 26 March | Breskens | 26 March | |||||
| 1990 | Breskens | 17 February | Breskens | 17 March | |||||
| 1987 | Breskens | 26 May | Breskens | 26 May | |||||
| 1980 | Breskens | 5 October | Breskens | 5 October |
