Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 9 May | Breskens | 9 May | |||||
| 2018 | Breskens | 7 April | Breskens | 7 April | |||||
| 2017 | Breskens | 30 April | Breskens | 30 April | |||||
| 2016 | Breskens | 9 May | Breskens | 9 May | |||||
| 2014 | Breskens | 28 April | Breskens | 28 April | |||||
| 2013 | Breskens | 8 May | Breskens | 8 May | |||||
| 2012 | Breskens | 30 April | Breskens | 30 April | |||||
| 2011 | Breskens | 7 May | Breskens | 7 May | |||||
| 2010 | Breskens | 24 April | Breskens | 24 April | |||||
| 2009 | Breskens | 25 April | Breskens | 25 April | |||||
| 2006 | Breskens | 2 May | Breskens | 12 June | |||||
| 2004 | Breskens | 26 April | Breskens | 26 April | |||||
| 2002 | Breskens | 13 May | Breskens | 13 May | |||||
| 2000 | Breskens | 6 May | Breskens | 6 May | |||||
| 1998 | Breskens | 15 May | Breskens | 15 May | |||||
| 1992 | Breskens | 3 May | Breskens | 14 May | |||||
| 1991 | Breskens | 24 April | Breskens | 24 April |
