Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 21 February | Breskens | 14 November | |||||
| 2020 | Breskens | 8 February | Breskens | 8 November | |||||
| 2019 | Breskens | 20 March | Breskens | 21 November | |||||
| 2018 | Breskens | 23 March | Breskens | 6 October | |||||
| 2017 | Breskens | 25 March | Breskens | 30 September | |||||
| 2016 | Breskens | 1 April | Breskens | 1 October | |||||
| 2015 | Breskens | 16 April | Breskens | 3 October | |||||
| 2014 | Breskens | 28 March | Breskens | 20 April | |||||
| 2013 | Breskens | 7 April | Breskens | 27 April | |||||
| 2012 | Breskens | 19 February | Breskens | 19 February | |||||
| 2010 | Breskens | 2 April | Breskens | 2 April | |||||
| 2009 | Breskens | 6 April | Breskens | 13 May | |||||
| 2008 | Breskens | 15 March | Breskens | 22 March | |||||
| 1991 | Breskens | 3 February | Breskens | 3 February |
