Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 28 April | Breskens | 28 April | |||||
| 2020 | Breskens | 14 March | Breskens | 10 April | |||||
| 2019 | Breskens | 6 April | Breskens | 22 April | |||||
| 2018 | Breskens | 30 March | Breskens | 21 May | |||||
| 2017 | Breskens | 15 February | Breskens | 6 May | |||||
| 2015 | Breskens | 10 April | Breskens | 2 May | |||||
| 2012 | Breskens | 3 March | Breskens | 3 March | |||||
| 2009 | Breskens | 14 March | Breskens | 14 March | |||||
| 2006 | Breskens | 18 March | Breskens | 18 March | |||||
| 2004 | Breskens | 27 March | Breskens | 17 April | |||||
| 2001 | Breskens | 3 March | Breskens | 13 March | |||||
| 2000 | Breskens | 26 March | Breskens | 9 April |
