Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2020 | Breskens | 5 April | Breskens | 5 April | |||||
| 2014 | Breskens | 19 May | Breskens | 19 May | |||||
| 2009 | Breskens | 10 April | Breskens | 1 November | |||||
| 2006 | Breskens | 16 October | Breskens | 16 October | |||||
| 1989 | Breskens | 30 April | Breskens | 30 April |
