Phenology
| Year | Migration site | First | Migration site | Last | |||||
|---|---|---|---|---|---|---|---|---|---|
| 2023 | Breskens | 30 April | Breskens | 19 May | |||||
| 2022 | Breskens | 16 April | Breskens | 22 May | |||||
| 2021 | Breskens | 24 April | Breskens | 28 May | |||||
| 2020 | Breskens | 16 April | Breskens | 7 May | |||||
| 2019 | Breskens | 16 April | Breskens | 18 May | |||||
| 2018 | Breskens | 12 May | Breskens | 12 May | |||||
| 2017 | Breskens | 17 May | Breskens | 17 May | |||||
| 2016 | Breskens | 7 May | Breskens | 8 May | |||||
| 2011 | Breskens | 30 April | Breskens | 8 May | |||||
| 2009 | Breskens | 30 April | Breskens | 1 May | |||||
| 2008 | Breskens | 27 April | Breskens | 24 May | |||||
| 2007 | Breskens | 21 April | Breskens | 24 May | |||||
| 2006 | Breskens | 6 May | Breskens | 6 May | |||||
| 2005 | Breskens | 23 April | Breskens | 1 June | |||||
| 2003 | Breskens | 14 April | Breskens | 4 May | |||||
| 2002 | Breskens | 17 May | Breskens | 2 June | |||||
| 1994 | Breskens | 14 May | Breskens | 14 May | |||||
| 1993 | Breskens | 30 April | Breskens | 24 May | |||||
| 1992 | Breskens | 19 May | Breskens | 19 May |
