Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 8 May | Breskens | 8 May | |||||
| 2017 | Breskens | 30 April | Breskens | 30 April | |||||
| 2012 | Breskens | 25 May | Breskens | 25 May | |||||
| 2011 | Breskens | 22 April | Breskens | 7 May | |||||
| 2010 | Breskens | 26 May | Breskens | 26 May | |||||
| 2009 | Breskens | 25 April | Breskens | 29 April | |||||
| 2008 | Breskens | 19 April | Breskens | 23 May | |||||
| 2007 | Breskens | 13 May | Breskens | 13 May | |||||
| 2006 | Breskens | 4 May | Breskens | 4 May | |||||
| 2005 | Breskens | 16 April | Breskens | 22 May | |||||
| 2003 | Breskens | 28 April | Breskens | 16 May | |||||
| 2002 | Breskens | 13 May | Breskens | 21 May | |||||
| 2001 | Breskens | 23 April | Breskens | 30 May | |||||
| 2000 | Breskens | 6 May | Breskens | 15 May | |||||
| 1999 | Breskens | 27 April | Breskens | 7 May | |||||
| 1998 | Breskens | 21 April | Breskens | 11 May | |||||
| 1997 | Breskens | 27 April | Breskens | 18 May | |||||
| 1996 | Breskens | 2 May | Breskens | 5 May | |||||
| 1995 | Breskens | 25 April | Breskens | 3 May | |||||
| 1994 | Breskens | 23 April | Breskens | 21 May | |||||
| 1993 | Breskens | 21 April | Breskens | 21 May | |||||
| 1992 | Breskens | 24 April | Breskens | 18 May | |||||
| 1991 | Breskens | 25 April | Breskens | 18 May | |||||
| 1990 | Breskens | 24 April | Breskens | 6 May | |||||
| 1989 | Breskens | 13 April | Breskens | 13 April | |||||
| 1988 | Breskens | 5 May | Breskens | 20 May | |||||
| 1987 | Breskens | 23 April | Breskens | 29 April |
