Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2017 | Breskens | 26 May | Breskens | 27 May | |||||
| 2012 | Breskens | 27 May | Breskens | 27 May | |||||
| 2001 | Breskens | 22 May | Breskens | 22 May | |||||
| 1998 | Breskens | 14 May | Breskens | 15 May | |||||
| 1997 | Breskens | 17 May | Breskens | 17 May | |||||
| 1994 | Breskens | 1 June | Breskens | 1 June | |||||
| 1990 | Breskens | 29 May | Breskens | 29 May |
