Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2011 | Breskens | 26 April | Breskens | 26 April | |||||
| 2004 | Breskens | 17 March | Breskens | 17 March | |||||
| 2003 | Breskens | 24 February | Breskens | 24 February | |||||
| 2001 | Breskens | 9 May | Breskens | 11 May | |||||
| 1998 | Breskens | 25 March | Breskens | 25 March | |||||
| 1993 | Breskens | 22 March | Breskens | 22 March | |||||
| 1990 | Breskens | 23 February | Breskens | 23 February |
