Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2017 | Breskens | 29 October | Breskens | 29 October | |||||
| 2015 | Breskens | 3 October | Breskens | 3 October | |||||
| 2012 | Breskens | 4 January | Breskens | 4 January | |||||
| 2009 | Breskens | 3 October | Breskens | 3 October | |||||
| 2007 | Breskens | 2 December | Breskens | 2 December | |||||
| 2006 | Breskens | 7 October | Breskens | 7 October | |||||
| 2003 | Breskens | 28 April | Breskens | 28 April | |||||
| 2002 | Breskens | 17 May | Breskens | 21 May | |||||
| 1990 | Breskens | 2 March | Breskens | 2 March | |||||
| 1988 | Breskens | 8 May | Breskens | 8 May |
