Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 24 April | Breskens | 28 April | |||||
| 2020 | Breskens | 5 April | Breskens | 22 April | |||||
| 2019 | Breskens | 19 April | Breskens | 19 April | |||||
| 2018 | Breskens | 13 April | Breskens | 8 May | |||||
| 2017 | Breskens | 30 April | Breskens | 30 April | |||||
| 2016 | Breskens | 8 May | Breskens | 9 May | |||||
| 2015 | Breskens | 24 April | Breskens | 24 April | |||||
| 2014 | Breskens | 18 May | Breskens | 18 May | |||||
| 2013 | Breskens | 22 March | Breskens | 22 March | |||||
| 2011 | Breskens | 18 April | Breskens | 24 April | |||||
| 2009 | Breskens | 6 March | Breskens | 1 May | |||||
| 2008 | Breskens | 4 May | Breskens | 4 May | |||||
| 2007 | Breskens | 30 April | Breskens | 30 April | |||||
| 2006 | Breskens | 4 May | Breskens | 4 May | |||||
| 2005 | Breskens | 23 March | Breskens | 4 May | |||||
| 2003 | Breskens | 1 March | Breskens | 25 April | |||||
| 2002 | Breskens | 27 March | Breskens | 13 May | |||||
| 2000 | Breskens | 3 April | Breskens | 29 April | |||||
| 1995 | Breskens | 14 March | Breskens | 14 March | |||||
| 1993 | Breskens | 9 April | Breskens | 9 April | |||||
| 1992 | Breskens | 21 March | Breskens | 4 April | |||||
| 1990 | Breskens | 2 March | Breskens | 2 March |
