Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2022 | Breskens | 26 April | Breskens | 26 April | |||||
| 2021 | Breskens | 2 May | Breskens | 2 May | |||||
| 2020 | Breskens | 24 April | Breskens | 24 April | |||||
| 2019 | Breskens | 31 March | Breskens | 31 March | |||||
| 2017 | Breskens | 28 April | Breskens | 29 April | |||||
| 2015 | Breskens | 16 April | Breskens | 4 May | |||||
| 1993 | Breskens | 11 March | Breskens | 11 March | |||||
| 1992 | Breskens | 14 February | Breskens | 11 June | |||||
| 1991 | Breskens | 16 February | Breskens | 29 May | |||||
| 1986 | Breskens | 2 May | Breskens | 2 May | |||||
| 1985 | Breskens | 24 March | Breskens | 16 May | |||||
| 1984 | Breskens | 23 April | Breskens | 19 May | |||||
| 1983 | Breskens | 20 March | Breskens | 15 April | |||||
| 1982 | Breskens | 26 March | Breskens | 16 May | |||||
| 1981 | Breskens | 15 March | Breskens | 16 May |
