Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2023 | Breskens | 10 April | Breskens | 24 May | |||||
| 2022 | Breskens | 20 April | Breskens | 16 May | |||||
| 2021 | Breskens | 31 May | Breskens | 1 June | |||||
| 2020 | Breskens | 5 April | Breskens | 22 May | |||||
| 2019 | Breskens | 4 April | Breskens | 20 October | |||||
| 2018 | Breskens | 19 April | Breskens | 8 May | |||||
| 2016 | Breskens | 21 May | Breskens | 21 May | |||||
| 2014 | Breskens | 18 May | Breskens | 18 May | |||||
| 2012 | Breskens | 7 May | Breskens | 7 May | |||||
| 1992 | Breskens | 29 March | Breskens | 29 March |
