Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 9 May | Breskens | 9 May | |||||
| 2019 | Breskens | 20 April | Breskens | 7 June | |||||
| 2015 | Breskens | 20 April | Breskens | 20 April | |||||
| 2014 | Breskens | 21 April | Breskens | 6 May | |||||
| 2013 | Breskens | 2 May | Breskens | 28 May | |||||
| 2009 | Breskens | 8 May | Breskens | 8 May | |||||
| 2008 | Breskens | 3 May | Breskens | 13 May | |||||
| 2006 | Breskens | 3 May | Breskens | 9 June | |||||
| 2005 | Breskens | 30 April | Breskens | 30 April | |||||
| 2004 | Breskens | 17 May | Breskens | 17 May | |||||
| 2002 | Breskens | 29 April | Breskens | 25 May | |||||
| 2001 | Breskens | 21 April | Breskens | 11 May | |||||
| 2000 | Breskens | 28 April | Breskens | 3 June | |||||
| 1999 | Breskens | 24 April | Breskens | 7 May | |||||
| 1998 | Breskens | 22 April | Breskens | 11 May | |||||
| 1997 | Breskens | 10 April | Breskens | 5 June | |||||
| 1994 | Breskens | 21 April | Breskens | 13 May | |||||
| 1993 | Breskens | 30 April | Breskens | 30 April | |||||
| 1992 | Breskens | 25 April | Breskens | 25 April | |||||
| 1990 | Breskens | 18 March | Breskens | 18 March | |||||
| 1988 | Breskens | 30 April | Breskens | 30 April |
