Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 8 May | Breskens | 14 October | |||||
| 2020 | Breskens | 22 May | Breskens | 18 October | |||||
| 2019 | Breskens | 19 April | Breskens | 20 April | |||||
| 2018 | Breskens | 11 May | Breskens | 11 May | |||||
| 2012 | Breskens | 26 March | Breskens | 26 March | |||||
| 2007 | Breskens | 12 April | Breskens | 2 May | |||||
| 2006 | Breskens | 9 June | Breskens | 9 June | |||||
| 2005 | Breskens | 21 April | Breskens | 17 October | |||||
| 2004 | Breskens | 1 April | Breskens | 1 April | |||||
| 2002 | Breskens | 18 April | Breskens | 13 May | |||||
| 2000 | Breskens | 3 April | Breskens | 11 May | |||||
| 1999 | Breskens | 6 May | Breskens | 6 May | |||||
| 1998 | Breskens | 5 May | Breskens | 5 May |
