Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 27 October | Breskens | 27 November | |||||
| 2017 | Breskens | 29 October | Breskens | 29 October | |||||
| 2012 | Breskens | 4 January | Breskens | 4 January | |||||
| 2008 | Breskens | 2 February | Breskens | 2 February | |||||
| 2007 | Breskens | 15 December | Breskens | 15 December | |||||
| 2006 | Breskens | 16 October | Breskens | 16 October | |||||
| 2002 | Breskens | 25 January | Breskens | 16 February | |||||
| 2000 | Breskens | 9 February | Breskens | 9 February | |||||
| 1994 | Breskens | 18 February | Breskens | 18 February | |||||
| 1993 | Breskens | 3 April | Breskens | 3 April | |||||
| 1991 | Breskens | 17 February | Breskens | 17 February | |||||
| 1986 | Breskens | 14 February | Breskens | 15 February | |||||
| 1983 | Breskens | 18 February | Breskens | 23 February |
