Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 31 October | Breskens | 31 October | |||||
| 2020 | Breskens | 6 April | Breskens | 6 April | |||||
| 2019 | Breskens | 1 April | Breskens | 20 April | |||||
| 2018 | Breskens | 6 April | Breskens | 10 April | |||||
| 2017 | Breskens | 6 May | Breskens | 6 May | |||||
| 2013 | Breskens | 1 April | Breskens | 1 April | |||||
| 2011 | Breskens | 24 March | Breskens | 29 March | |||||
| 2006 | Breskens | 25 March | Breskens | 25 March | |||||
| 2004 | Breskens | 21 February | Breskens | 17 March | |||||
| 2003 | Breskens | 21 February | Breskens | 16 March | |||||
| 2002 | Breskens | 3 April | Breskens | 3 April | |||||
| 2001 | Breskens | 28 March | Breskens | 8 May | |||||
| 1998 | Breskens | 10 March | Breskens | 10 March | |||||
| 1997 | Breskens | 7 March | Breskens | 12 March | |||||
| 1996 | Breskens | 9 March | Breskens | 16 April | |||||
| 1995 | Breskens | 8 March | Breskens | 6 May | |||||
| 1994 | Breskens | 31 January | Breskens | 11 May | |||||
| 1993 | Breskens | 5 March | Breskens | 10 March | |||||
| 1992 | Breskens | 28 February | Breskens | 18 April | |||||
| 1991 | Breskens | 24 February | Breskens | 27 April | |||||
| 1990 | Breskens | 17 March | Breskens | 17 March | |||||
| 1989 | Breskens | 22 January | Breskens | 10 March | |||||
| 1987 | Breskens | 6 March | Breskens | 24 April | |||||
| 1986 | Breskens | 9 March | Breskens | 3 May | |||||
| 1985 | Breskens | 3 March | Breskens | 19 April | |||||
| 1984 | Breskens | 15 March | Breskens | 24 March | |||||
| 1983 | Breskens | 18 February | Breskens | 29 March | |||||
| 1982 | Breskens | 5 February | Breskens | 4 April | |||||
| 1981 | Breskens | 15 March | Breskens | 10 April |
