Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2021 | Breskens | 2 May | Breskens | 26 October | |||||
| 2017 | Breskens | 7 May | Breskens | 29 October | |||||
| 2014 | Breskens | 4 October | Breskens | 4 October | |||||
| 2010 | Breskens | 2 October | Breskens | 2 October | |||||
| 2009 | Breskens | 19 April | Breskens | 19 April | |||||
| 2007 | Breskens | 1 May | Breskens | 2 May | |||||
| 2005 | Breskens | 7 May | Breskens | 7 May | |||||
| 2002 | Breskens | 12 February | Breskens | 29 April | |||||
| 1999 | Breskens | 25 February | Breskens | 25 February |
